Make cc::CompositorFrames movable [Part 2 of 2]

components/exo/surface_unittest.cc

 // Copyright 2015 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 "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_manager.h"
 #include "components/exo/buffer.h"
@@ skipping 173 matching lines @@
   surface->Commit();
   EXPECT_EQ(crop_size.ToString(),
             surface->window()->bounds().size().ToString());
   EXPECT_EQ(crop_size.ToString(), surface->content_size().ToString());
 }
 
 const cc::DelegatedFrameData* GetFrameFromSurface(Surface* surface) {
   cc::SurfaceId surface_id = surface->surface_id();
   cc::SurfaceManager* surface_manager =
       aura::Env::GetInstance()->context_factory()->GetSurfaceManager();
-  const cc::CompositorFrame* frame =
+  const cc::CompositorFrame& frame =
       surface_manager->GetSurfaceForId(surface_id)->GetEligibleFrame();
-  return frame->delegated_frame_data.get();
+  return frame.delegated_frame_data.get();
 }
 
 TEST_F(SurfaceTest, SetBlendMode) {
   gfx::Size buffer_size(1, 1);
   std::unique_ptr<Buffer> buffer(
       new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
   std::unique_ptr<Surface> surface(new Surface);
 
   surface->Attach(buffer.get());
   surface->SetBlendMode(SkXfermode::kSrc_Mode);
@@ skipping 22 matching lines @@
 
 TEST_F(SurfaceTest, Commit) {
   std::unique_ptr<Surface> surface(new Surface);
 
   // Calling commit without a buffer should succeed.
   surface->Commit();
 }
 
 }  // namespace
 }  // namespace exo