Bug 1254419 - Make always-set members of AnimationProperty(Value)Details required; r=bz

At the same time we also make the 'warning' member of AnimationPropertyDetails
no longer nullable and simply use the absence of the member to indicate "no
warning" (which is what we were already doing -- we were never actually setting
it to null).

MozReview-Commit-ID: HdRDbqhCdmw

--HG--
extra : rebase_source : 0282bd9f0e213aa0e1ed1f5b25d58b10fb3dbc0b
extra : histedit_source : 7d1f81dc57e2a55ab0ed6c4919a25b87819d9d58

dom/animation/KeyframeEffect.cpp

@@ -1806,11 +1806,11 @@ CreatePropertyValue(nsCSSProperty aProperty,
                     const StyleAnimationValue& aValue,
                     AnimationPropertyValueDetails& aResult)
 {
-  aResult.mOffset.Construct(aOffset);
+  aResult.mOffset = aOffset;
 
   nsString stringValue;
   StyleAnimationValue::UncomputeValue(aProperty, aValue, stringValue);
-  aResult.mValue.Construct(stringValue);
+  aResult.mValue = stringValue;
 
   if (aTimingFunction) {
     aResult.mEasing.Construct();
@@ -1819,7 +1819,7 @@ CreatePropertyValue(nsCSSProperty aProperty,
     aResult.mEasing.Construct(NS_LITERAL_STRING("linear"));
   }
 
-  aResult.mComposite.Construct(CompositeOperation::Replace);
+  aResult.mComposite = CompositeOperation::Replace;
 }
 
 void
@@ -1828,10 +1828,9 @@ KeyframeEffectReadOnly::GetProperties(
 {
   for (const AnimationProperty& property : mProperties) {
     AnimationPropertyDetails propertyDetails;
-    propertyDetails.mProperty.Construct(
-      NS_ConvertASCIItoUTF16(nsCSSProps::GetStringValue(property.mProperty)));
-    propertyDetails.mRunningOnCompositor.Construct(
-      property.mIsRunningOnCompositor);
+    propertyDetails.mProperty =
+      NS_ConvertASCIItoUTF16(nsCSSProps::GetStringValue(property.mProperty));
+    propertyDetails.mRunningOnCompositor = property.mIsRunningOnCompositor;
 
     nsXPIDLString localizedString;
     if (property.mPerformanceWarning &&
@@ -1839,8 +1838,7 @@ KeyframeEffectReadOnly::GetProperties(
       propertyDetails.mWarning.Construct(localizedString);
     }
 
-    propertyDetails.mValues.Construct();
-    if (!propertyDetails.mValues.Value().SetCapacity(
+    if (!propertyDetails.mValues.SetCapacity(
           property.mSegments.Length(), mozilla::fallible)) {
       MOZ_CRASH("Out of memory allocating values array");
     }
@@ -1862,8 +1860,7 @@ KeyframeEffectReadOnly::GetProperties(
       }
       // The following won't fail since we have already allocated the capacity
       // above.
-      propertyDetails.mValues.Value().AppendElement(fromValue,
-                                                    mozilla::fallible);
+      propertyDetails.mValues.AppendElement(fromValue, mozilla::fallible);
 
       // Normally we can ignore the to-value for this segment since it is
       // identical to the from-value from the next segment. However, we need
@@ -1879,8 +1876,7 @@ KeyframeEffectReadOnly::GetProperties(
         // last property value or before a sudden jump so we just drop the
         // easing property altogether.
         toValue.mEasing.Reset();
-        propertyDetails.mValues.Value().AppendElement(toValue,
-                                                      mozilla::fallible);
+        propertyDetails.mValues.AppendElement(toValue, mozilla::fallible);
       }
     }
 

dom/webidl/KeyframeEffect.webidl

@@ -47,17 +47,17 @@ interface KeyframeEffectReadOnly : AnimationEffectReadOnly {
 
 // Non-standard extensions
 dictionary AnimationPropertyValueDetails {
-  double             offset;
-  DOMString          value;
-  DOMString          easing;
-  CompositeOperation composite;
+  required double             offset;
+  required DOMString          value;
+           DOMString          easing;
+  required CompositeOperation composite;
 };
 
 dictionary AnimationPropertyDetails {
-  DOMString                               property;
-  boolean                                 runningOnCompositor;
-  DOMString?                              warning;
-  sequence<AnimationPropertyValueDetails> values;
+  required DOMString                               property;
+  required boolean                                 runningOnCompositor;
+           DOMString                               warning;
+  required sequence<AnimationPropertyValueDetails> values;
 };
 
 partial interface KeyframeEffectReadOnly {