Enable fast/images with slimming paint

Source/core/paint/ViewDisplayList.h

Index: Source/core/paint/ViewDisplayList.h
diff --git a/Source/core/paint/ViewDisplayList.h b/Source/core/paint/ViewDisplayList.h
index 854e1bb65dca6eb2c8c0fafadce332668bd903e5..c64bbbedc023ba817e12be35a973ffe7d10cf398 100644
--- a/Source/core/paint/ViewDisplayList.h
+++ b/Source/core/paint/ViewDisplayList.h
@@ -49,18 +49,19 @@ public:
         EndClip = 27,
         BeginFilter = 28,
         EndFilter = 29,
-        BeginTransparency = 30,

[chrishtr, 2014/11/25 00:29:58]

Let's get rid of the numbers that are not necessary here.

-        EndTransparency = 31,
-        ClipBoxChildBlockBackgrounds = 32,
-        ClipBoxFloat = 33,
-        ClipBoxForeground = 34,
-        ClipBoxChildOutlines = 35,
-        ClipBoxSelection = 36,
-        ClipBoxCollapsedTableBorders = 37,
-        ClipBoxTextClip = 38,
-        ClipBoxClippingMask = 39,
-        BeginTransform = 40,
-        EndTransform = 41
+        TransparencyClip = 30,
+        BeginTransparency = 31,
+        EndTransparency = 32,
+        ClipBoxChildBlockBackgrounds = 33,
+        ClipBoxFloat = 34,
+        ClipBoxForeground = 35,
+        ClipBoxChildOutlines = 36,
+        ClipBoxSelection = 37,
+        ClipBoxCollapsedTableBorders = 38,
+        ClipBoxTextClip = 39,
+        ClipBoxClippingMask = 40,
+        BeginTransform = 41,
+        EndTransform = 42
     };
 
     virtual ~DisplayItem() { }
@@ -71,6 +72,8 @@ public:
     Type type() const { return m_id.type; }
     bool idsEqual(const DisplayItem& other) const { return m_id.renderer == other.m_id.renderer && m_id.type == other.m_id.type; }
 
+    static Type paintPhaseToClipType(PaintPhase);
+
 #ifndef NDEBUG
     static WTF::String typeAsDebugString(DisplayItem::Type);
     static WTF::String rendererDebugString(const RenderObject*);