Revert of Re-land: cc: Use worker context for one-copy tile initialization.

cc/resources/resource_pool.cc

 // Copyright 2012 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/resources/resource_pool.h"
 
 #include <algorithm>
 
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
@@ skipping 187 matching lines @@
   return false;
 }
 
 void ResourcePool::DeleteResource(scoped_ptr<PoolResource> resource) {
   size_t resource_bytes = ResourceUtil::UncheckedSizeInBytes<size_t>(
       resource->size(), resource->format());
   memory_usage_bytes_ -= resource_bytes;
   --resource_count_;
 }
 
-void ResourcePool::CheckBusyResources() {
+void ResourcePool::CheckBusyResources(bool wait_if_needed) {
   for (size_t i = 0; i < busy_resources_.size();) {
     ResourceDeque::iterator it(busy_resources_.begin() + i);
     PoolResource* resource = *it;
 
+    if (wait_if_needed)
+      resource_provider_->WaitReadLockIfNeeded(resource->id());
+
     if (resource_provider_->CanLockForWrite(resource->id())) {
       DidFinishUsingResource(busy_resources_.take(it));
     } else if (resource_provider_->IsLost(resource->id())) {
       // Remove lost resources from pool.
       DeleteResource(busy_resources_.take(it));
     } else {
       ++i;
     }
   }
 }
@@ skipping 12 matching lines @@
   for (const auto& resource : busy_resources_) {
     resource->OnMemoryDump(pmd, resource_provider_, false /* is_free */);
   }
   for (const auto& entry : in_use_resources_) {
     entry.second->OnMemoryDump(pmd, resource_provider_, false /* is_free */);
   }
   return true;
 }
 
 }  // namespace cc