Make SingleThreadProxy a SchedulerClient

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_argument.h"
 #include "base/debug/trace_event_synthetic_delay.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 "cc/trees/scoped_swap_promise_checker.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "ui/gfx/frame_time.h"
 
 namespace cc {
 
 namespace {
 
 // Measured in seconds.
 const double kSmoothnessTakesPriorityExpirationDelay = 0.25;
 
 unsigned int nextBeginFrameId = 0;
 
-class SwapPromiseChecker {
- public:
-  explicit SwapPromiseChecker(LayerTreeHost* layer_tree_host)
-      : layer_tree_host_(layer_tree_host) {}
-
-  ~SwapPromiseChecker() {
-    layer_tree_host_->BreakSwapPromises(SwapPromise::COMMIT_FAILS);
-  }
-
- private:
-  LayerTreeHost* layer_tree_host_;
-};
-
 }  // namespace
 
 struct ThreadProxy::CommitPendingRequest {
   CompletionEvent completion;
   bool commit_pending;
 };
 
 struct ThreadProxy::SchedulerStateRequest {
   CompletionEvent completion;
   scoped_ptr<base::Value> state;
@@ skipping 396 matching lines @@
 }
 
 void ThreadProxy::SetNextCommitWaitsForActivation() {
   DCHECK(IsMainThread());
   DCHECK(!blocked_main().main_thread_inside_commit);
   blocked_main().commit_waits_for_activation = true;
 }
 
 void ThreadProxy::SetDeferCommits(bool defer_commits) {
   DCHECK(IsMainThread());
-  DCHECK_NE(main().defer_commits, defer_commits);
+  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);
 
   if (!main().defer_commits && main().pending_deferred_commit) {
     Proxy::MainThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::BeginMainFrame,
                    main_thread_weak_ptr_,
@@ skipping 259 matching lines @@
 
   if (main().defer_commits) {
     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 SwapPromiseChecker checks LayerTressHost's
-  // swap promises.
-  SwapPromiseChecker swap_promise_checker(layer_tree_host());
+  // LayerTreeImpl. The destructor of ScopedSwapPromiseChecker aborts the
+  // remaining swap promises.
+  ScopedSwapPromiseChecker swap_promise_checker(layer_tree_host());
 
   main().commit_requested = false;
   main().commit_request_sent_to_impl_thread = false;
   main().animate_requested = false;
 
   if (!layer_tree_host()->visible()) {
     TRACE_EVENT_INSTANT0("cc", "EarlyOut_NotVisible", TRACE_EVENT_SCOPE_THREAD);
     bool did_handle = false;
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
@@ skipping 649 matching lines @@
 
   impl().timing_history.DidActivateSyncTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc