cc: Use correct message loop proxy in BlockingTaskRunner

cc/trees/thread_proxy.cc

 // Copyright 2011 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/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 184 matching lines @@
 
 void ThreadProxy::DidLoseOutputSurface() {
   TRACE_EVENT0("cc", "ThreadProxy::DidLoseOutputSurface");
   DCHECK(IsMainThread());
   layer_tree_host()->DidLoseOutputSurface();
 
   {
     DebugScopedSetMainThreadBlocked main_thread_blocked(this);
 
     // Return lost resources to their owners immediately.
-    BlockingTaskRunner::CapturePostTasks blocked;
+    BlockingTaskRunner::CapturePostTasks blocked(
+        blocking_main_thread_task_runner());
 
     CompletionEvent completion;
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::DeleteContentsTexturesOnImplThread,
                    impl_thread_weak_ptr_,
                    &completion));
     completion.Wait();
   }
 }
@@ skipping 637 matching lines @@
   // point of view, but asynchronously performed on the impl thread,
   // coordinated by the Scheduler.
   {
     TRACE_EVENT0("cc", "ThreadProxy::BeginMainFrame::commit");
 
     DebugScopedSetMainThreadBlocked main_thread_blocked(this);
 
     // This CapturePostTasks should be destroyed before CommitComplete() is
     // called since that goes out to the embedder, and we want the embedder
     // to receive its callbacks before that.
-    BlockingTaskRunner::CapturePostTasks blocked;
+    BlockingTaskRunner::CapturePostTasks blocked(
+        blocking_main_thread_task_runner());
 
     CompletionEvent completion;
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::StartCommitOnImplThread,
                    impl_thread_weak_ptr_,
                    &completion,
                    queue.release()));
     completion.Wait();
 
@@ skipping 523 matching lines @@
 
   impl().timing_history.DidActivateSyncTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc