GL Implementation for GPU Discardable

gpu/command_buffer/service/context_group.cc

Index: gpu/command_buffer/service/context_group.cc
diff --git a/gpu/command_buffer/service/context_group.cc b/gpu/command_buffer/service/context_group.cc
index de793240f9b33f38a63ab05d96f2103cab443c77..d8f8c5680939cd1251e1d7611eb525d4c498ce74 100644
--- a/gpu/command_buffer/service/context_group.cc
+++ b/gpu/command_buffer/service/context_group.cc
@@ -21,6 +21,7 @@
 #include "gpu/command_buffer/service/progress_reporter.h"
 #include "gpu/command_buffer/service/renderbuffer_manager.h"
 #include "gpu/command_buffer/service/sampler_manager.h"
+#include "gpu/command_buffer/service/service_discardable_manager.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "gpu/command_buffer/service/transfer_buffer_manager.h"
@@ -69,7 +70,8 @@ ContextGroup::ContextGroup(
     bool bind_generates_resource,
     gpu::ImageFactory* image_factory,
     ProgressReporter* progress_reporter,
-    const GpuFeatureInfo& gpu_feature_info)
+    const GpuFeatureInfo& gpu_feature_info,
+    const scoped_refptr<ServiceDiscardableManager>& discardable_manager)
     : gpu_preferences_(gpu_preferences),
       mailbox_manager_(mailbox_manager),
       memory_tracker_(memory_tracker),
@@ -109,8 +111,10 @@ ContextGroup::ContextGroup(
       image_factory_(image_factory),
       passthrough_resources_(new PassthroughResources),
       progress_reporter_(progress_reporter),
-      gpu_feature_info_(gpu_feature_info) {
+      gpu_feature_info_(gpu_feature_info),
+      discardable_manager_(discardable_manager) {
   {
+    CHECK(discardable_manager);
     DCHECK(feature_info_);
     if (!mailbox_manager_.get())
       mailbox_manager_ = new MailboxManagerImpl;