GL Implementation for GPU Discardable

gpu/ipc/service/gpu_channel_manager.h

Index: gpu/ipc/service/gpu_channel_manager.h
diff --git a/gpu/ipc/service/gpu_channel_manager.h b/gpu/ipc/service/gpu_channel_manager.h
index 3c11dee8e681c32fc49f728456701e34feecc589..6f9554d7bc2ba5f31189a42d267935a7c7ff1b90 100644
--- a/gpu/ipc/service/gpu_channel_manager.h
+++ b/gpu/ipc/service/gpu_channel_manager.h
@@ -20,6 +20,7 @@
 #include "gpu/command_buffer/common/activity_flags.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
+#include "gpu/command_buffer/service/service_discardable_manager.h"
 #include "gpu/config/gpu_driver_bug_workarounds.h"
 #include "gpu/config/gpu_feature_info.h"
 #include "gpu/gpu_export.h"
@@ -157,6 +158,7 @@ class GPU_EXPORT GpuChannelManager {
   scoped_refptr<gl::GLSurface> default_offscreen_surface_;
   GpuMemoryBufferFactory* const gpu_memory_buffer_factory_;
   GpuFeatureInfo gpu_feature_info_;
+  scoped_refptr<ServiceDiscardableManager> discardable_manager_;
 #if defined(OS_ANDROID)
   // Last time we know the GPU was powered on. Global for tracking across all
   // transport surfaces.