Deliver IPC messages together with SwapCompositorFrame

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"
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/debug/trace_event_synthetic_delay.h"
 #include "base/metrics/histogram.h"
 #include "cc/base/swap_promise.h"
 #include "cc/debug/benchmark_instrumentation.h"
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/input/input_handler.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/resources/prioritized_resource_manager.h"
 #include "cc/scheduler/delay_based_time_source.h"
 #include "cc/scheduler/scheduler.h"
 #include "cc/trees/blocking_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "ui/gfx/frame_time.h"
 
+namespace cc {
+
 namespace {
 
 // Measured in seconds.
 const double kSmoothnessTakesPriorityExpirationDelay = 0.25;
 
 class SwapPromiseChecker {
  public:
-  explicit SwapPromiseChecker(cc::LayerTreeHost* layer_tree_host)
+  explicit SwapPromiseChecker(LayerTreeHost* layer_tree_host)
       : layer_tree_host_(layer_tree_host) {}
 
   ~SwapPromiseChecker() {
-    layer_tree_host_->BreakSwapPromises(cc::SwapPromise::COMMIT_FAILS);
+    layer_tree_host_->BreakSwapPromises(SwapPromise::COMMIT_FAILS);
   }
 
  private:
-  cc::LayerTreeHost* layer_tree_host_;
+  LayerTreeHost* layer_tree_host_;
 };
 
 }  // namespace
 
-namespace cc {
-
 struct ThreadProxy::CommitPendingRequest {
   CompletionEvent completion;
   bool commit_pending;
 };
 
 struct ThreadProxy::SchedulerStateRequest {
   CompletionEvent completion;
   scoped_ptr<base::Value> state;
 };
 
@@ skipping 680 matching lines @@
         base::Bind(&ThreadProxy::BeginMainFrameAbortedOnImplThread,
                    impl_thread_weak_ptr_,
                    did_handle));
     return;
   }
 
   if (layer_tree_host()->output_surface_lost()) {
     TRACE_EVENT_INSTANT0(
         "cc", "EarlyOut_OutputSurfaceLost", TRACE_EVENT_SCOPE_THREAD);
     bool did_handle = false;
+    DCHECK(false);
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::BeginMainFrameAbortedOnImplThread,
                    impl_thread_weak_ptr_,
                    did_handle));
     return;
   }
 
   // Do not notify the impl thread of commit requests that occur during
   // the apply/animate/layout part of the BeginMainFrameAndCommit process since
@@ skipping 70 matching lines @@
         FROM_HERE,
         base::Bind(&ThreadProxy::BeginMainFrameAbortedOnImplThread,
                    impl_thread_weak_ptr_,
                    did_handle));
 
     // Although the commit is internally aborted, this is because it has been
     // detected to be a no-op.  From the perspective of an embedder, this commit
     // went through, and input should no longer be throttled, etc.
     layer_tree_host()->CommitComplete();
     layer_tree_host()->DidBeginMainFrame();
+    layer_tree_host()->BreakSwapPromises(SwapPromise::COMMIT_NO_UPDATE);
     return;
   }
 
   // Notify the impl thread that the main thread is ready to commit. This will
   // begin the commit process, which is blocking from the main thread's
   // point of view, but asynchronously performed on the impl thread,
   // coordinated by the Scheduler.
   {
     TRACE_EVENT0("cc", "ThreadProxy::BeginMainFrame::commit");
 
@@ skipping 584 matching lines @@
 
   impl().timing_history.DidActivatePendingTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc