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

cc/resources/resource_pool.h

Index: cc/resources/resource_pool.h
diff --git a/cc/resources/resource_pool.h b/cc/resources/resource_pool.h
index 88816aa73d4a49132eb9f7f8d41d245f2ff73a5d..a88af9803eda711a84a27e8ad1d76706d57dcec7 100644
--- a/cc/resources/resource_pool.h
+++ b/cc/resources/resource_pool.h
@@ -36,10 +36,7 @@ class CC_EXPORT ResourcePool {
                               size_t max_resource_count);
 
   void ReduceResourceUsage();
-  // This might block if |wait_if_needed| is true and one of the currently
-  // busy resources has a read lock fence that needs to be waited upon before
-  // it can be locked for write again.
-  void CheckBusyResources(bool wait_if_needed);
+  void CheckBusyResources();
 
   size_t total_memory_usage_bytes() const { return memory_usage_bytes_; }
   size_t acquired_memory_usage_bytes() const {