Migrate most of cc/ from WebKit::WebTransformationMatrix to gfx::Transform

cc/direct_renderer.h

Index: cc/direct_renderer.h
diff --git a/cc/direct_renderer.h b/cc/direct_renderer.h
index 27c42a684b14950ed87e210e4f6ce0f07b5c2db8..c22c1a19228cacc4d1a4adb0b5639c9fbb5e58fe 100644
--- a/cc/direct_renderer.h
+++ b/cc/direct_renderer.h
@@ -39,8 +39,8 @@ public:
 
         gfx::RectF rootDamageRect;
 
-        WebKit::WebTransformationMatrix projectionMatrix;
-        WebKit::WebTransformationMatrix windowMatrix;
+        gfx::Transform projectionMatrix;
+        gfx::Transform windowMatrix;
         bool flippedY;
     };
 
@@ -71,7 +71,7 @@ protected:
     };
 
     static gfx::RectF quadVertexRect();
-    static void quadRectTransform(WebKit::WebTransformationMatrix* quadRectTransform, const WebKit::WebTransformationMatrix& quadTransform, const gfx::RectF& quadRect);
+    static void quadRectTransform(gfx::Transform* quadRectTransform, const gfx::Transform& quadTransform, const gfx::RectF& quadRect);
     static void initializeMatrices(DrawingFrame&, const gfx::Rect& drawRect, bool flipY);
     static gfx::Rect moveScissorToWindowSpace(const DrawingFrame&, gfx::RectF scissorRect);
     static gfx::RectF computeScissorRectForRenderPass(const DrawingFrame& frame);