Refactoring: Make ~CSSStyleSheetResource empty.

Source/core/fetch/Resource.cpp

Index: Source/core/fetch/Resource.cpp
diff --git a/Source/core/fetch/Resource.cpp b/Source/core/fetch/Resource.cpp
index 36d47f13b00e5b33b943f55d748c1403a64c8919..7258d9a11950b2fef028bdef8c904964157e3b4c 100644
--- a/Source/core/fetch/Resource.cpp
+++ b/Source/core/fetch/Resource.cpp
@@ -150,6 +150,10 @@ Resource::~Resource()
 #endif
 }
 
+void Resource::dispose()
+{
+}
+
 void Resource::failBeforeStarting()
 {
     WTF_LOG(ResourceLoading, "Cannot start loading '%s'", url().string().latin1().data());
@@ -551,6 +555,7 @@ bool Resource::deleteIfPossible()
 {
     if (canDelete() && !memoryCache()->contains(this)) {
         InspectorInstrumentation::willDestroyResource(this);
+        dispose();
         delete this;
         return true;
     }