cc: Split Proxy and TaskRunnerProvider for the LayerTreeHost

cc/trees/task_runner_provider.h

 // Copyright 2015 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.
 
 #ifndef CC_TREES_TASK_RUNNER_PROVIDER_H_
 #define CC_TREES_TASK_RUNNER_PROVIDER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/cc_export.h"
 
 namespace base {
 namespace trace_event {
 class TracedValue;
 }
 class SingleThreadTaskRunner;
 }
 
 namespace cc {
 class BlockingTaskRunner;
 
 // Class responsible for controlling access to the main and impl task runners.
 // Useful for assertion checks.
 class CC_EXPORT TaskRunnerProvider {
  public:
+  static scoped_ptr<TaskRunnerProvider> Create(
+      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
+    return make_scoped_ptr(
+        new TaskRunnerProvider(main_task_runner, impl_task_runner));
+  }
+
   base::SingleThreadTaskRunner* MainThreadTaskRunner() const;
   bool HasImplThread() const;
   base::SingleThreadTaskRunner* ImplThreadTaskRunner() const;
 
   // Debug hooks.
   bool IsMainThread() const;
   bool IsImplThread() const;
   bool IsMainThreadBlocked() const;
 #if DCHECK_IS_ON()
   void SetMainThreadBlocked(bool is_main_thread_blocked);
   void SetCurrentThreadIsImplThread(bool is_impl_thread);
 #endif
 
   virtual ~TaskRunnerProvider();
 
   BlockingTaskRunner* blocking_main_thread_task_runner() const {
     return blocking_main_thread_task_runner_.get();
   }
 
+ protected:
   TaskRunnerProvider(
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
 
- protected:
   friend class DebugScopedSetImplThread;
   friend class DebugScopedSetMainThread;
   friend class DebugScopedSetMainThreadBlocked;
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
   scoped_ptr<BlockingTaskRunner> blocking_main_thread_task_runner_;
 
 #if DCHECK_IS_ON()
@@ skipping 31 matching lines @@
   ~DebugScopedSetMainThreadBlocked() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
 };
 #endif
 
 }  // namespace cc
 
 #endif  // CC_TREES_TASK_RUNNER_PROVIDER_H_