cc::SharedQuadState: drop CopyFrom and add copy constructor

cc/surfaces/surface_aggregator.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/surfaces/surface_aggregator.h"
 
 #include <stddef.h>
 
 #include <map>
 
@@ skipping 300 matching lines @@
   referenced_surfaces_.erase(it);
 }
 
 SharedQuadState* SurfaceAggregator::CopySharedQuadState(
     const SharedQuadState* source_sqs,
     const gfx::Transform& target_transform,
     const ClipData& clip_rect,
     RenderPass* dest_render_pass) {
   SharedQuadState* copy_shared_quad_state =
       dest_render_pass->CreateAndAppendSharedQuadState();
-  copy_shared_quad_state->CopyFrom(source_sqs);
+  *copy_shared_quad_state = *source_sqs;
   // target_transform contains any transformation that may exist
   // between the context that these quads are being copied from (i.e. the
   // surface's draw transform when aggregated from within a surface) to the
   // target space of the pass. This will be identity except when copying the
   // root draw pass from a surface into a pass when the surface draw quad's
   // transform is not identity.
   copy_shared_quad_state->quad_to_target_transform.ConcatTransform(
       target_transform);
 
   ClipData new_clip_rect = CalculateClipRect(
@@ skipping 507 matching lines @@
 
 void SurfaceAggregator::SetFullDamageForSurface(SurfaceId surface_id) {
   auto it = previous_contained_surfaces_.find(surface_id);
   if (it == previous_contained_surfaces_.end())
     return;
   // Set the last drawn index as 0 to ensure full damage next time it's drawn.
   it->second = 0;
 }
 
 }  // namespace cc