cc: Split Proxy to eliminate unnecessary dependencies on the impl side

cc/trees/thread_verifier.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/proxy.h"
-
+#include "cc/trees/thread_verifier.h"
 #include "base/single_thread_task_runner.h"
 #include "cc/trees/blocking_task_runner.h"
 
 namespace cc {
 
-base::SingleThreadTaskRunner* Proxy::MainThreadTaskRunner() const {
+base::SingleThreadTaskRunner* ThreadVerifier::MainThreadTaskRunner() const {
   return main_task_runner_.get();
 }
 
-bool Proxy::HasImplThread() const { return !!impl_task_runner_.get(); }
+bool ThreadVerifier::HasImplThread() const {
+  return !!impl_task_runner_.get();
+}
 
-base::SingleThreadTaskRunner* Proxy::ImplThreadTaskRunner() const {
+base::SingleThreadTaskRunner* ThreadVerifier::ImplThreadTaskRunner() const {
   return impl_task_runner_.get();
 }
 
-bool Proxy::IsMainThread() const {
+bool ThreadVerifier::IsMainThread() const {
 #if DCHECK_IS_ON()
   if (impl_thread_is_overridden_)
     return false;
 
   bool is_main_thread = base::PlatformThread::CurrentId() == main_thread_id_;
   if (is_main_thread && main_task_runner_.get()) {
     DCHECK(main_task_runner_->BelongsToCurrentThread());
   }
   return is_main_thread;
 #else
   return true;
 #endif
 }
 
-bool Proxy::IsImplThread() const {
+bool ThreadVerifier::IsImplThread() const {
 #if DCHECK_IS_ON()
   if (impl_thread_is_overridden_)
     return true;
   if (!impl_task_runner_.get())
     return false;
   return impl_task_runner_->BelongsToCurrentThread();
 #else
   return true;
 #endif
 }
 
 #if DCHECK_IS_ON()
-void Proxy::SetCurrentThreadIsImplThread(bool is_impl_thread) {
+void ThreadVerifier::SetCurrentThreadIsImplThread(bool is_impl_thread) {
   impl_thread_is_overridden_ = is_impl_thread;
 }
 #endif
 
-bool Proxy::IsMainThreadBlocked() const {
+bool ThreadVerifier::IsMainThreadBlocked() const {
 #if DCHECK_IS_ON()
   return is_main_thread_blocked_;
 #else
   return true;
 #endif
 }
 
 #if DCHECK_IS_ON()
-void Proxy::SetMainThreadBlocked(bool is_main_thread_blocked) {
+void ThreadVerifier::SetMainThreadBlocked(bool is_main_thread_blocked) {
   is_main_thread_blocked_ = is_main_thread_blocked;
 }
 #endif
 
-Proxy::Proxy(scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-             scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
+ThreadVerifier::ThreadVerifier(
+    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
 #if !DCHECK_IS_ON()
     : main_task_runner_(main_task_runner),
       impl_task_runner_(impl_task_runner),
       blocking_main_thread_task_runner_(
           BlockingTaskRunner::Create(main_task_runner)) {
 #else
     : main_task_runner_(main_task_runner),
       impl_task_runner_(impl_task_runner),
       blocking_main_thread_task_runner_(
           BlockingTaskRunner::Create(main_task_runner)),
       main_thread_id_(base::PlatformThread::CurrentId()),
       impl_thread_is_overridden_(false),
       is_main_thread_blocked_(false) {
 #endif
 }
 
-Proxy::~Proxy() {
+ThreadVerifier::~ThreadVerifier() {
   DCHECK(IsMainThread());
 }
 
 }  // namespace cc