cc: Propagate read lock fences constraints to parent compositors.

cc/resources/resource_provider.h

 // 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.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 90 matching lines @@
   bool use_persistent_map_for_gpu_memory_buffers() const {
     return use_persistent_map_for_gpu_memory_buffers_;
   }
   size_t num_resources() const { return resources_.size(); }
 
   // Checks whether a resource is in use by a consumer.
   bool InUseByConsumer(ResourceId id);
 
   bool IsLost(ResourceId id);
 
+  void EnableReadLockFences(ResourceId id);

[piman, 2015/06/12 01:53:52]

nit: EnableReadLockFencesForTesting.

[Daniele Castagna, 2015/06/12 23:36:42]

We're actually planning to use this method for video resources that are created
in media.

+
   // Producer interface.
 
   ResourceType default_resource_type() const { return default_resource_type_; }
   ResourceType GetResourceType(ResourceId id);
 
   // Creates a resource of the default resource type.
   ResourceId CreateResource(const gfx::Size& size,
                             GLint wrap_mode,
                             TextureHint hint,
                             ResourceFormat format);
@@ skipping 542 matching lines @@
   return format_gl_data_format[format];
 }
 
 inline GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_