Revert of Idle cleanup for worker context

content/common/gpu/client/context_provider_command_buffer.cc

 // Copyright (c) 2013 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 "content/common/gpu/client/context_provider_command_buffer.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
@@ skipping 227 matching lines @@
   }
 
   // Do this last once the context is set up.
   std::string type_name =
       command_buffer_metrics::ContextTypeToString(context_type_);
   std::string unique_context_name =
       base::StringPrintf("%s-%p", type_name.c_str(), gles2_impl_.get());
   ContextGL()->TraceBeginCHROMIUM("gpu_toplevel", unique_context_name.c_str());
   // If support_locking_ is true, the context may be used from multiple
   // threads, and any async callstacks will need to hold the same lock, so
-  // give it to the command buffer and cache controller.
+  // give it to the command buffer.
   // We don't hold a lock here since there's no need, so set the lock very last
   // to prevent asserts that we're not holding it.
-  if (support_locking_) {
+  if (support_locking_)
     command_buffer_->SetLock(&context_lock_);
-    cache_controller_->SetLock(&context_lock_);
-  }
   return true;
 }
 
 void ContextProviderCommandBuffer::DetachFromThread() {
   context_thread_checker_.DetachFromThread();
 }
 
 gpu::gles2::GLES2Interface* ContextProviderCommandBuffer::ContextGL() {
   DCHECK(bind_succeeded_);
   DCHECK(context_thread_checker_.CalledOnValidThread());
@@ skipping 71 matching lines @@
 
 void ContextProviderCommandBuffer::SetLostContextCallback(
     const LostContextCallback& lost_context_callback) {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   DCHECK(lost_context_callback_.is_null() ||
          lost_context_callback.is_null());
   lost_context_callback_ = lost_context_callback;
 }
 
 }  // namespace content