cc: Turn SharedQuadState into a struct-like class similar to DrawQuads.

cc/draw_quad.h

Index: cc/draw_quad.h
diff --git a/cc/draw_quad.h b/cc/draw_quad.h
index 255d3543fa50d88c5d0a7472f755674da7466fcc..7dee19c4dc3d76abaaa0681813b408c12e2f1791 100644
--- a/cc/draw_quad.h
+++ b/cc/draw_quad.h
@@ -35,9 +35,9 @@ class CC_EXPORT DrawQuad {
       const SharedQuadState* copied_shared_quad_state) const;
 
   // TODO(danakj): Chromify or remove these SharedQuadState helpers.
-  const WebKit::WebTransformationMatrix& quadTransform() const { return shared_quad_state->quadTransform; }
-  gfx::Rect visibleContentRect() const { return shared_quad_state->visibleContentRect; }
-  gfx::Rect clippedRectInTarget() const { return shared_quad_state->clippedRectInTarget; }
+  const WebKit::WebTransformationMatrix& quadTransform() const { return shared_quad_state->content_to_target_transform; }
+  gfx::Rect visibleContentRect() const { return shared_quad_state->visible_content_rect; }
+  gfx::Rect clippedRectInTarget() const { return shared_quad_state->clipped_rect_in_target; }
   float opacity() const { return shared_quad_state->opacity; }
 
   Material material;