Remove some style-data-clearing functions that no one uses and that don't do

the right thing anyway.  Bug 169989, r+sr=dbaron

content/base/src/nsStyleContext.cpp

@@ -397,16 +397,6 @@ nsStyleContext::ApplyStyleFixups(nsIPresContext* aPresContext)
   }
 }
 
-void
-nsStyleContext::ClearCachedDataForRule(nsIStyleRule* aInlineStyleRule)
-{
-  mRuleNode->ClearCachedData(aInlineStyleRule); // XXXdwh.  If we're willing to *really* special case
-                                           // inline style, we could only invalidate the struct data
-                                           // that actually changed.  For example, if someone changes
-                                           // style.left, we really only need to blow away cached
-                                           // data in the position struct.
-}
-
 void
 nsStyleContext::ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule)
 {

content/base/src/nsStyleSet.cpp

@@ -194,7 +194,6 @@ public:
   virtual nsCachedStyleData* GetDefaultStyleData();
 
   virtual nsresult GetRuleTree(nsRuleNode** aResult);
-  virtual nsresult ClearCachedDataInRuleTree(nsIStyleRule* aRule);
   
   virtual nsresult ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule);
 
@@ -1506,14 +1505,6 @@ StyleSetImpl::GetDefaultStyleData()
   return &mDefaultStyleData;
 }
 
-nsresult
-StyleSetImpl::ClearCachedDataInRuleTree(nsIStyleRule* aInlineStyleRule)
-{
-  if (mRuleTree)
-    mRuleTree->ClearCachedDataInSubtree(aInlineStyleRule);
-  return NS_OK;
-}
-
 nsresult
 StyleSetImpl::ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule)
 {

content/shared/public/nsStyleContext.h

@@ -123,8 +123,6 @@ public:
 
   nsStyleStruct* GetUniqueStyleData(nsIPresContext* aPresContext, const nsStyleStructID& aSID);
 
-  void ClearCachedDataForRule(nsIStyleRule* aRule);
-
   void ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule);
 
   nsChangeHint CalcStyleDifference(nsStyleContext* aOther);

layout/base/public/nsIStyleSet.h

@@ -110,7 +110,6 @@ public:
   virtual void ReplaceAgentStyleSheets(nsISupportsArray* aNewSheets) = 0;
   
   virtual nsresult GetRuleTree(nsRuleNode** aResult) = 0;
-  virtual nsresult ClearCachedDataInRuleTree(nsIStyleRule* aRule) = 0;
   
   // The following two methods can be used to tear down and reconstruct a rule tree.  The idea
   // is to first call BeginRuleTreeReconstruct, which will set aside the old rule

layout/style/nsStyleContext.cpp

@@ -397,16 +397,6 @@ nsStyleContext::ApplyStyleFixups(nsIPresContext* aPresContext)
   }
 }
 
-void
-nsStyleContext::ClearCachedDataForRule(nsIStyleRule* aInlineStyleRule)
-{
-  mRuleNode->ClearCachedData(aInlineStyleRule); // XXXdwh.  If we're willing to *really* special case
-                                           // inline style, we could only invalidate the struct data
-                                           // that actually changed.  For example, if someone changes
-                                           // style.left, we really only need to blow away cached
-                                           // data in the position struct.
-}
-
 void
 nsStyleContext::ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule)
 {

layout/style/nsStyleContext.h

@@ -123,8 +123,6 @@ public:
 
   nsStyleStruct* GetUniqueStyleData(nsIPresContext* aPresContext, const nsStyleStructID& aSID);
 
-  void ClearCachedDataForRule(nsIStyleRule* aRule);
-
   void ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule);
 
   nsChangeHint CalcStyleDifference(nsStyleContext* aOther);

layout/style/nsStyleSet.cpp

@@ -194,7 +194,6 @@ public:
   virtual nsCachedStyleData* GetDefaultStyleData();
 
   virtual nsresult GetRuleTree(nsRuleNode** aResult);
-  virtual nsresult ClearCachedDataInRuleTree(nsIStyleRule* aRule);
   
   virtual nsresult ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule);
 
@@ -1506,14 +1505,6 @@ StyleSetImpl::GetDefaultStyleData()
   return &mDefaultStyleData;
 }
 
-nsresult
-StyleSetImpl::ClearCachedDataInRuleTree(nsIStyleRule* aInlineStyleRule)
-{
-  if (mRuleTree)
-    mRuleTree->ClearCachedDataInSubtree(aInlineStyleRule);
-  return NS_OK;
-}
-
 nsresult
 StyleSetImpl::ClearStyleData(nsIPresContext* aPresContext, nsIStyleRule* aRule)
 {