gpu: Add a new extension CHROMIUM_deschedule.

gpu/command_buffer/service/in_process_command_buffer.cc

Index: gpu/command_buffer/service/in_process_command_buffer.cc
diff --git a/gpu/command_buffer/service/in_process_command_buffer.cc b/gpu/command_buffer/service/in_process_command_buffer.cc
index ad390a937986099b237619505d8246ef7c6c4769..2b0afd68b01db6954b408c03f09cc59da75113b5 100644
--- a/gpu/command_buffer/service/in_process_command_buffer.cc
+++ b/gpu/command_buffer/service/in_process_command_buffer.cc
@@ -421,6 +421,12 @@ bool InProcessCommandBuffer::InitializeOnGpuThread(
   decoder_->SetWaitFenceSyncCallback(
       base::Bind(&InProcessCommandBuffer::WaitFenceSyncOnGpuThread,
                  base::Unretained(this)));
+  decoder_->SetDescheduleUntilFinishedCallback(
+      base::Bind(&InProcessCommandBuffer::DescheduleUntilFinishedOnGpuThread,
+                 base::Unretained(this)));
+  decoder_->SetRescheduleAfterFinishedCallback(
+      base::Bind(&InProcessCommandBuffer::RescheduleAfterFinishedOnGpuThread,
+                 base::Unretained(this)));
 
   image_factory_ = params.image_factory;
 
@@ -882,6 +888,14 @@ bool InProcessCommandBuffer::WaitFenceSyncOnGpuThread(
   return true;
 }
 
+void InProcessCommandBuffer::DescheduleUntilFinishedOnGpuThread() {
+  NOTIMPLEMENTED();
+}
+
+void InProcessCommandBuffer::RescheduleAfterFinishedOnGpuThread() {
+  NOTIMPLEMENTED();
+}
+
 void InProcessCommandBuffer::SignalSyncTokenOnGpuThread(
     const SyncToken& sync_token, const base::Closure& callback) {
   gpu::SyncPointManager* sync_point_manager = service_->sync_point_manager();