cc: Remove Unused Code on LayerImpl

Remove unused code.

TBR=enne

Bug: 822873
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: Icfce16105876d05efaa83b858fd4d39be3add686
Reviewed-on: https://chromium-review.googlesource.com/967157
Commit-Queue: weiliangc <weiliangc@chromium.org>
Reviewed-by: weiliangc <weiliangc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543882}

cc/layers/layer_impl.cc

@@ -638,10 +638,6 @@ float LayerImpl::Opacity() const {
     return 1.f;
 }
 
-const gfx::Transform& LayerImpl::Transform() const {
-  return GetTransformTree().Node(transform_tree_index())->local;
-}
-
 void LayerImpl::SetElementId(ElementId element_id) {
   if (element_id == element_id_)
     return;

cc/layers/layer_impl.h

@@ -123,8 +123,6 @@ class CC_EXPORT LayerImpl {
 
   bool is_clipped() const { return draw_properties_.is_clipped; }
 
-  void UpdatePropertyTreeScrollOffset();
-
   LayerTreeImpl* layer_tree_impl() const { return layer_tree_impl_; }
 
   void PopulateSharedQuadState(viz::SharedQuadState* state,
@@ -196,7 +194,6 @@ class CC_EXPORT LayerImpl {
   bool contents_opaque() const { return contents_opaque_; }
 
   float Opacity() const;
-  const gfx::Transform& Transform() const;
 
   // Stable identifier for clients. See comment in cc/trees/element_id.h.
   void SetElementId(ElementId element_id);
@@ -533,7 +530,6 @@ class CC_EXPORT LayerImpl {
 
   gfx::PointF position_;
 
-  gfx::Rect clip_rect_in_target_space_;
   int transform_tree_index_;
   int effect_tree_index_;
   int clip_tree_index_;