cc: Split Proxy to eliminate unnecessary dependencies on the impl side

cc/trees/layer_tree_host_unittest_context.cc

 // Copyright 2012 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/trees/layer_tree_host.h"
 
 #include "base/basictypes.h"
 #include "cc/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/layers/heads_up_display_layer.h"
@@ skipping 93 matching lines @@
     else
       return FakeOutputSurface::Create3d(context3d.Pass());
   }
 
   DrawResult PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
                                    LayerTreeHostImpl::FrameData* frame,
                                    DrawResult draw_result) override {
     if (draw_result == DRAW_ABORTED_MISSING_HIGH_RES_CONTENT) {
       // Only valid for single-threaded compositing, which activates
       // immediately and will try to draw again when content has finished.
-      DCHECK(!host_impl->proxy()->HasImplThread());
+      DCHECK(!host_impl->task_runner_provider()->HasImplThread());
       return draw_result;
     }
     EXPECT_EQ(DRAW_SUCCESS, draw_result);
     if (!times_to_lose_during_draw_)
       return draw_result;
 
     --times_to_lose_during_draw_;
     LoseContext();
 
     times_to_fail_create_ = times_to_fail_recreate_;
@@ skipping 1497 matching lines @@
   void AfterTest() override {}
 
   bool deferred_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostContextTestLoseAfterSendingBeginMainFrame);
 
 }  // namespace
 }  // namespace cc