cc: Throttle swaps in Scheduler instead of OutputSurface

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 415 matching lines @@
   TRACE_EVENT0("cc", "ThreadProxy::CheckOutputSurfaceStatusOnImplThread");
   DCHECK(IsImplThread());
   if (!impl().layer_tree_host_impl->IsContextLost())
     return;
   if (ContextProvider* offscreen_contexts =
           impl().layer_tree_host_impl->offscreen_context_provider())
     offscreen_contexts->VerifyContexts();
   impl().scheduler->DidLoseOutputSurface();
 }
 
-void ThreadProxy::OnSwapBuffersCompleteOnImplThread() {
-  TRACE_EVENT0("cc", "ThreadProxy::OnSwapBuffersCompleteOnImplThread");
+void ThreadProxy::SetMaxSwapsPendingOnImplThread(int max) {

[danakj, 2014/04/17 15:05:39]

+enne FYI: STP will need to do this also.

+  impl().scheduler->SetMaxSwapsPending(max);
+}
+
+void ThreadProxy::DidSwapBuffersOnImplThread() {
+  impl().scheduler->DidSwapBuffers();
+}
+
+void ThreadProxy::DidSwapBuffersCompleteOnImplThread() {
+  TRACE_EVENT0("cc", "ThreadProxy::DidSwapBuffersCompleteOnImplThread");
   DCHECK(IsImplThread());
+  impl().scheduler->DidSwapBuffersComplete();
   Proxy::MainThreadTaskRunner()->PostTask(
       FROM_HERE,
       base::Bind(&ThreadProxy::DidCompleteSwapBuffers, main_thread_weak_ptr_));
 }
 
 void ThreadProxy::SetNeedsBeginFrame(bool enable) {
   TRACE_EVENT1("cc", "ThreadProxy::SetNeedsBeginFrame", "enable", enable);
   impl().layer_tree_host_impl->SetNeedsBeginFrame(enable);
   UpdateBackgroundAnimateTicking();
 }
@@ skipping 781 matching lines @@
         result.did_readback = true;
       } else {
         result.draw_result = DrawSwapReadbackResult::DRAW_ABORTED_CONTEXT_LOST;
       }
     }
     impl().readback_request->success = result.did_readback;
     impl().readback_request->completion.Signal();
     impl().readback_request = NULL;
   } else if (draw_frame) {
     DCHECK(swap_requested);
-    result.did_swap = impl().layer_tree_host_impl->SwapBuffers(frame);
+    result.did_request_swap = impl().layer_tree_host_impl->SwapBuffers(frame);
 
     // We don't know if we have incomplete tiles if we didn't actually swap.
-    if (result.did_swap) {
+    if (result.did_request_swap) {
       DCHECK(!frame.has_no_damage);
       SetSwapUsedIncompleteTileOnImplThread(frame.contains_incomplete_tile);
     }
   }
 
   // Tell the main thread that the the newly-commited frame was drawn.
   if (impl().next_frame_is_newly_committed_frame) {
     impl().next_frame_is_newly_committed_frame = false;
     Proxy::MainThreadTaskRunner()->PostTask(
         FROM_HERE,
@@ skipping 433 matching lines @@
 
   impl().timing_history.DidActivatePendingTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc