Bug 1458814: Remove a bit of trivially dead code. r=hiro

MozReview-Commit-ID: GG41v4TejBU

--HG--
extra : rebase_source : 5dc1f255178ae723eed47ec3fdbd6595fa84da62

dom/smil/nsSMILCSSValueType.cpp

@@ -40,11 +40,8 @@ struct ValueWrapper {
   ValueWrapper(nsCSSPropertyID aPropID, const AnimationValue& aValue)
     : mPropID(aPropID)
   {
-    if (aValue.mServo) {
+    MOZ_ASSERT(!aValue.IsNull());
     mServoValues.AppendElement(aValue.mServo);
-      return;
-    }
-    MOZ_CRASH("old style system disabled");
   }
   ValueWrapper(nsCSSPropertyID aPropID,
                const RefPtr<RawServoAnimationValue>& aValue)
@@ -58,7 +55,7 @@ struct ValueWrapper {
       return false;
     }
 
-    if (!mServoValues.IsEmpty()) {
+    MOZ_ASSERT(!mServoValues.IsEmpty());
     size_t len = mServoValues.Length();
     if (len != aOther.mServoValues.Length()) {
       return false;
@@ -72,9 +69,6 @@ struct ValueWrapper {
     return true;
   }
 
-    MOZ_CRASH("old style system disabled");
-  }
-
   bool operator!=(const ValueWrapper& aOther) const
   {
     return !(*this == aOther);
@@ -306,10 +300,6 @@ AddOrAccumulate(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
     return false;
   }
 
-  bool isServo = valueToAddWrapper
-                 ? !valueToAddWrapper->mServoValues.IsEmpty()
-                 : !destWrapper->mServoValues.IsEmpty();
-  if (isServo) {
   return AddOrAccumulateForServo(aDest,
                                  valueToAddWrapper,
                                  destWrapper,
@@ -317,9 +307,6 @@ AddOrAccumulate(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
                                  aCount);
 }
 
-  MOZ_CRASH("old style system disabled");
-}
-
 nsresult
 nsSMILCSSValueType::SandwichAdd(nsSMILValue& aDest,
                                 const nsSMILValue& aValueToAdd) const
@@ -389,14 +376,9 @@ nsSMILCSSValueType::ComputeDistance(const nsSMILValue& aFrom,
   const ValueWrapper* fromWrapper = ExtractValueWrapper(aFrom);
   const ValueWrapper* toWrapper = ExtractValueWrapper(aTo);
   MOZ_ASSERT(toWrapper, "expecting non-null endpoint");
-
-  if (!toWrapper->mServoValues.IsEmpty()) {
   return ComputeDistanceForServo(fromWrapper, *toWrapper, aDistance);
 }
 
-  MOZ_CRASH("old style system disabled");
-}
-
 
 static nsresult
 InterpolateForServo(const ValueWrapper* aStartWrapper,
@@ -468,17 +450,12 @@ nsSMILCSSValueType::Interpolate(const nsSMILValue& aStartVal,
   const ValueWrapper* startWrapper = ExtractValueWrapper(aStartVal);
   const ValueWrapper* endWrapper = ExtractValueWrapper(aEndVal);
   MOZ_ASSERT(endWrapper, "expecting non-null endpoint");
-
-  if (!endWrapper->mServoValues.IsEmpty()) {
   return InterpolateForServo(startWrapper,
                              *endWrapper,
                              aUnitDistance,
                              aResult);
 }
 
-  MOZ_CRASH("old style system disabled");
-}
-
 // Helper function to extract presContext
 static nsPresContext*
 GetPresContextForElement(Element* aElem)
@@ -613,10 +590,6 @@ nsSMILCSSValueType::ValueToString(const nsSMILValue& aValue,
     return;
   }
 
-  if (wrapper->mServoValues.IsEmpty()) {
-    MOZ_CRASH("old style system disabled");
-  }
-
   if (nsCSSProps::IsShorthand(wrapper->mPropID)) {
     // In case of shorthand on servo, we iterate over all mServoValues array
     // since we have multiple AnimationValues in the array for each longhand
@@ -691,9 +664,6 @@ nsSMILCSSValueType::FinalizeValue(nsSMILValue& aValue,
     return;
   }
 
-  bool isServo = !valueToMatchWrapper->mServoValues.IsEmpty();
-
-  if (isServo) {
   ServoAnimationValues zeroValues;
   zeroValues.SetCapacity(valueToMatchWrapper->mServoValues.Length());
 
@@ -707,7 +677,4 @@ nsSMILCSSValueType::FinalizeValue(nsSMILValue& aValue,
   }
   aValue.mU.mPtr = new ValueWrapper(valueToMatchWrapper->mPropID,
                                     Move(zeroValues));
-  } else {
-    MOZ_CRASH("old style system disabled");
-  }
 }

layout/style/StyleAnimationValue.cpp

@@ -118,11 +118,8 @@ float
 AnimationValue::GetOpacity() const
 {
   MOZ_ASSERT(mServo);
-  if (mServo) {
   return Servo_AnimationValue_GetOpacity(mServo);
 }
-  MOZ_CRASH("old style system disabled");
-}
 
 already_AddRefed<const nsCSSValueSharedList>
 AnimationValue::GetTransformList() const
@@ -130,11 +127,7 @@ AnimationValue::GetTransformList() const
   MOZ_ASSERT(mServo);
 
   RefPtr<nsCSSValueSharedList> transform;
-  if (mServo) {
   Servo_AnimationValue_GetTransform(mServo, &transform);
-  } else {
-    MOZ_CRASH("old style system disabled");
-  }
   return transform.forget();
 }
 
@@ -142,27 +135,17 @@ Size
 AnimationValue::GetScaleValue(const nsIFrame* aFrame) const
 {
   MOZ_ASSERT(mServo);
-
-  if (mServo) {
   RefPtr<nsCSSValueSharedList> list;
   Servo_AnimationValue_GetTransform(mServo, &list);
   return nsStyleTransformMatrix::GetScaleValue(list, aFrame);
 }
-  MOZ_CRASH("old style system disabled");
-}
 
 void
 AnimationValue::SerializeSpecifiedValue(nsCSSPropertyID aProperty,
                                         nsAString& aString) const
 {
   MOZ_ASSERT(mServo);
-
-  if (mServo) {
   Servo_AnimationValue_Serialize(mServo, aProperty, &aString);
-    return;
-  }
-
-  MOZ_CRASH("old style system disabled");
 }
 
 bool
@@ -175,14 +158,9 @@ AnimationValue::IsInterpolableWith(nsCSSPropertyID aProperty,
 
   MOZ_ASSERT(mServo);
   MOZ_ASSERT(aToValue.mServo);
-
-  if (mServo) {
   return Servo_AnimationValues_IsInterpolable(mServo, aToValue.mServo);
 }
 
-  MOZ_CRASH("old style system disabled");
-}
-
 double
 AnimationValue::ComputeDistance(nsCSSPropertyID aProperty,
                                 const AnimationValue& aOther,
@@ -195,17 +173,13 @@ AnimationValue::ComputeDistance(nsCSSPropertyID aProperty,
   MOZ_ASSERT(mServo);
   MOZ_ASSERT(aOther.mServo);
 
-  double distance= 0.0;
-  if (mServo) {
-    distance = Servo_AnimationValues_ComputeDistance(mServo, aOther.mServo);
+  double distance =
+    Servo_AnimationValues_ComputeDistance(mServo, aOther.mServo);
   return distance < 0.0
          ? 0.0
          : distance;
 }
 
-  MOZ_CRASH("old style system disabled");
-}
-
 /* static */ AnimationValue
 AnimationValue::FromString(nsCSSPropertyID aProperty,
                            const nsAString& aValue,

servo/ports/geckolib/glue.rs

@@ -4520,7 +4520,6 @@ pub extern "C" fn Servo_GetComputedKeyframeValues(
     raw_data: RawServoStyleSetBorrowed,
     computed_keyframes: RawGeckoComputedKeyframeValuesListBorrowedMut
 ) {
-    use std::mem;
     use style::properties::LonghandIdSet;
 
     let data = PerDocumentStyleData::from_ffi(raw_data).borrow();
@@ -4581,10 +4580,6 @@ pub extern "C" fn Servo_GetComputedKeyframeValues(
                 // This is safe since we immediately write to the uninitialized values.
                 unsafe { animation_values.set_len((property_index + 1) as u32) };
                 animation_values[property_index].mProperty = property.to_nscsspropertyid();
-                // We only make sure we have enough space for this variable,
-                // but didn't construct a default value for StyleAnimationValue,
-                // so we should zero it to avoid getting undefined behaviors.
-                animation_values[property_index].mValue.mGecko = unsafe { mem::zeroed() };
                 match value {
                     Some(v) => {
                         animation_values[property_index].mValue.mServo.set_arc_leaky(Arc::new(v));