Bug 604596. Stop using an out param for the return value of GetSMILOverrideStyle. r=bzbarsky

content/base/public/nsIContent.h

@@ -76,8 +76,8 @@ enum nsLinkState {
 
 // IID for the nsIContent interface
 #define NS_ICONTENT_IID       \
-{ 0x8331ca9f, 0x8717, 0x4ab4, \
-  { 0xad, 0x17, 0xb4, 0x9d, 0xdc, 0xe8, 0xb6, 0x77 } }
+{ 0x5788c9eb, 0x646a, 0x4285, \
+  { 0xa2, 0x8c, 0xde, 0x0d, 0x43, 0x6b, 0x47, 0x72 } }
 
 /**
  * A node of content in a document's content model. This interface
@@ -914,7 +914,7 @@ public:
    * Note: This method is analogous to the 'GetStyle' method in
    * nsGenericHTMLElement and nsStyledElement.
    */
-  virtual nsresult GetSMILOverrideStyle(nsIDOMCSSStyleDeclaration** aStyle) = 0;
+  virtual nsIDOMCSSStyleDeclaration* GetSMILOverrideStyle() = 0;
 
   /**
    * Get the SMIL override style rule for this content node.  If the rule

content/base/src/nsGenericDOMDataNode.cpp

@@ -1115,11 +1115,10 @@ nsGenericDOMDataNode::WalkContentStyleRules(nsRuleWalker* aRuleWalker)
 }
 
 #ifdef MOZ_SMIL
-nsresult
-nsGenericDOMDataNode::GetSMILOverrideStyle(nsIDOMCSSStyleDeclaration** aStyle)
+nsIDOMCSSStyleDeclaration*
+nsGenericDOMDataNode::GetSMILOverrideStyle()
 {
-  *aStyle = nsnull;
-  return NS_ERROR_NOT_IMPLEMENTED;
+  return nsnull;
 }
 
 css::StyleRule*

content/base/src/nsGenericDOMDataNode.h

@@ -234,7 +234,7 @@ public:
   {
     return nsnull;
   }
-  virtual nsresult GetSMILOverrideStyle(nsIDOMCSSStyleDeclaration** aStyle);
+  virtual nsIDOMCSSStyleDeclaration* GetSMILOverrideStyle();
   virtual mozilla::css::StyleRule* GetSMILOverrideStyleRule();
   virtual nsresult SetSMILOverrideStyleRule(mozilla::css::StyleRule* aStyleRule,
                                             PRBool aNotify);

content/base/src/nsGenericElement.cpp

@@ -3349,19 +3349,16 @@ nsGenericElement::WalkContentStyleRules(nsRuleWalker* aRuleWalker)
 }
 
 #ifdef MOZ_SMIL
-nsresult
-nsGenericElement::GetSMILOverrideStyle(nsIDOMCSSStyleDeclaration** aStyle)
+nsIDOMCSSStyleDeclaration*
+nsGenericElement::GetSMILOverrideStyle()
 {
   nsGenericElement::nsDOMSlots *slots = DOMSlots();
 
   if (!slots->mSMILOverrideStyle) {
     slots->mSMILOverrideStyle = new nsDOMCSSAttributeDeclaration(this, PR_TRUE);
-    NS_ENSURE_TRUE(slots->mSMILOverrideStyle, NS_ERROR_OUT_OF_MEMORY);
   }
 
-  // Why bother with QI?
-  NS_ADDREF(*aStyle = slots->mSMILOverrideStyle);
-  return NS_OK;
+  return slots->mSMILOverrideStyle;
 }
 
 css::StyleRule*

content/base/src/nsGenericElement.h

@@ -455,7 +455,7 @@ public:
   {
     return nsnull;
   }
-  virtual nsresult GetSMILOverrideStyle(nsIDOMCSSStyleDeclaration** aStyle);
+  virtual nsIDOMCSSStyleDeclaration* GetSMILOverrideStyle();
   virtual mozilla::css::StyleRule* GetSMILOverrideStyleRule();
   virtual nsresult SetSMILOverrideStyleRule(mozilla::css::StyleRule* aStyleRule,
                                             PRBool aNotify);

content/smil/nsSMILCSSProperty.cpp

@@ -123,9 +123,8 @@ nsSMILCSSProperty::GetBaseValue() const
   // GENERAL CASE: Non-Shorthands
   // (1) Put empty string in override style for property mPropID
   // (saving old override style value, so we can set it again when we're done)
-  nsCOMPtr<nsIDOMCSSStyleDeclaration> overrideStyle;
-  mElement->GetSMILOverrideStyle(getter_AddRefs(overrideStyle));
-  nsCOMPtr<nsICSSDeclaration> overrideDecl = do_QueryInterface(overrideStyle);
+  nsCOMPtr<nsICSSDeclaration> overrideDecl =
+    do_QueryInterface(mElement->GetSMILOverrideStyle());
   nsAutoString cachedOverrideStyleVal;
   if (overrideDecl) {
     overrideDecl->GetPropertyValue(mPropID, cachedOverrideStyleVal);
@@ -192,11 +191,8 @@ nsSMILCSSProperty::SetAnimValue(const nsSMILValue& aValue)
   }
 
   // Use string value to style the target element
-  nsCOMPtr<nsIDOMCSSStyleDeclaration> overrideStyle;
-  mElement->GetSMILOverrideStyle(getter_AddRefs(overrideStyle));
-  NS_ABORT_IF_FALSE(overrideStyle, "Need a non-null overrideStyle");
-
-  nsCOMPtr<nsICSSDeclaration> overrideDecl = do_QueryInterface(overrideStyle);
+  nsCOMPtr<nsICSSDeclaration> overrideDecl =
+    do_QueryInterface(mElement->GetSMILOverrideStyle());
   if (overrideDecl) {
     overrideDecl->SetPropertyValue(mPropID, valStr);
   }
@@ -207,9 +203,8 @@ void
 nsSMILCSSProperty::ClearAnimValue()
 {
   // Put empty string in override style for our property
-  nsCOMPtr<nsIDOMCSSStyleDeclaration> overrideStyle;
-  mElement->GetSMILOverrideStyle(getter_AddRefs(overrideStyle));
-  nsCOMPtr<nsICSSDeclaration> overrideDecl = do_QueryInterface(overrideStyle);
+  nsCOMPtr<nsICSSDeclaration> overrideDecl =
+    do_QueryInterface(mElement->GetSMILOverrideStyle());
   if (overrideDecl) {
     overrideDecl->SetPropertyValue(mPropID, EmptyString());
   }