Revert of cc: Control defer_commits logic by Scheduler

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 434 matching lines @@
   DCHECK(IsMainThread());
   if (main().defer_commits == defer_commits)
     return;
 
   main().defer_commits = defer_commits;
   if (main().defer_commits)
     TRACE_EVENT_ASYNC_BEGIN0("cc", "ThreadProxy::SetDeferCommits", this);
   else
     TRACE_EVENT_ASYNC_END0("cc", "ThreadProxy::SetDeferCommits", this);
 
-  Proxy::ImplThreadTaskRunner()->PostTask(
-      FROM_HERE,
-      base::Bind(&ThreadProxy::SetDeferCommitsOnImplThread,
-                 impl_thread_weak_ptr_,
-                 defer_commits));
-}
-
-void ThreadProxy::SetDeferCommitsOnImplThread(bool defer_commits) const {
-  DCHECK(IsImplThread());
-  impl().scheduler->SetDeferCommits(defer_commits);
+  if (!main().defer_commits && main().pending_deferred_commit) {
+    Proxy::MainThreadTaskRunner()->PostTask(
+        FROM_HERE,
+        base::Bind(&ThreadProxy::BeginMainFrame,
+                   main_thread_weak_ptr_,
+                   base::Passed(&main().pending_deferred_commit)));
+  }
 }
 
 bool ThreadProxy::CommitRequested() const {
   DCHECK(IsMainThread());
   return main().commit_requested;
 }
 
 bool ThreadProxy::BeginMainFrameRequested() const {
   DCHECK(IsMainThread());
   return main().commit_request_sent_to_impl_thread;
@@ skipping 222 matching lines @@
 
 void ThreadProxy::BeginMainFrame(
     scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state) {
   benchmark_instrumentation::ScopedBeginFrameTask begin_frame_task(
       benchmark_instrumentation::kDoBeginFrame,
       begin_main_frame_state->begin_frame_id);
   TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("cc.BeginMainFrame");
   DCHECK(IsMainThread());
 
   if (main().defer_commits) {
-    TRACE_EVENT_INSTANT0("cc", "EarlyOut_DeferCommit",
-                         TRACE_EVENT_SCOPE_THREAD);
-    Proxy::ImplThreadTaskRunner()->PostTask(
-        FROM_HERE, base::Bind(&ThreadProxy::BeginMainFrameAbortedOnImplThread,
-                              impl_thread_weak_ptr_,
-                              CommitEarlyOutReason::ABORTED_DEFERRED_COMMIT));
+    main().pending_deferred_commit = begin_main_frame_state.Pass();
+    layer_tree_host()->DidDeferCommit();
+    TRACE_EVENT_INSTANT0(
+        "cc", "EarlyOut_DeferCommits", TRACE_EVENT_SCOPE_THREAD);
     return;
   }
 
   // If the commit finishes, LayerTreeHost will transfer its swap promises to
   // LayerTreeImpl. The destructor of ScopedSwapPromiseChecker aborts the
   // remaining swap promises.
   ScopedAbortRemainingSwapPromises swap_promise_checker(layer_tree_host());
 
   main().commit_requested = false;
   main().commit_request_sent_to_impl_thread = false;
@@ skipping 642 matching lines @@
 }
 
 void ThreadProxy::DidCompletePageScaleAnimationOnImplThread() {
   DCHECK(IsImplThread());
   Proxy::MainThreadTaskRunner()->PostTask(
       FROM_HERE, base::Bind(&ThreadProxy::DidCompletePageScaleAnimation,
                             main_thread_weak_ptr_));
 }
 
 }  // namespace cc