cc: Stop using drawableContentRect for occlusion.

cc/shared_quad_state.cc

Index: cc/shared_quad_state.cc
diff --git a/cc/shared_quad_state.cc b/cc/shared_quad_state.cc
index 001f594223c6121ff04bc3f8e8f04050e1d68d38..0e9c328626576497050c3cd18717d20978aa7dc8 100644
--- a/cc/shared_quad_state.cc
+++ b/cc/shared_quad_state.cc
@@ -21,13 +21,11 @@ scoped_ptr<SharedQuadState> SharedQuadState::Copy() const {
 void SharedQuadState::SetAll(
     const gfx::Transform& content_to_target_transform,
     const gfx::Rect& visible_content_rect,
-    const gfx::Rect& clipped_rect_in_target,
     const gfx::Rect& clip_rect,
     bool is_clipped,
     float opacity) {
   this->content_to_target_transform = content_to_target_transform;
   this->visible_content_rect = visible_content_rect;
-  this->clipped_rect_in_target = clipped_rect_in_target;
   this->clip_rect = clip_rect;
   this->is_clipped = is_clipped;
   this->opacity = opacity;