Make blink classes and structures in core/css fast-allocated

Source/core/css/StyleColor.h

Index: Source/core/css/StyleColor.h
diff --git a/Source/core/css/StyleColor.h b/Source/core/css/StyleColor.h
index 303c19f982cd6ca47a96a9ae19e531c6d7b7ff35..20cb4021a1536a12d1c3dbc9b02d0dfede8d1352 100644
--- a/Source/core/css/StyleColor.h
+++ b/Source/core/css/StyleColor.h
@@ -32,10 +32,12 @@
 #define StyleColor_h
 
 #include "platform/graphics/Color.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class StyleColor {
+    DISALLOW_ALLOCATION();
 public:
     StyleColor(Color color) : m_color(color), m_currentColor(false) { }
     static StyleColor currentColor() { return StyleColor(); }