Iterative cleanup for GL programs in GPU process

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 a71ca9b41a55deaf7fb5459a5a797a40f3862e5e..7ed17f009771531ee3ac582568ca0e455b239a17 100644
--- a/gpu/ipc/service/gpu_channel_manager.h
+++ b/gpu/ipc/service/gpu_channel_manager.h
@@ -9,6 +9,7 @@
 
 #include <deque>
 #include <memory>
+#include <queue>
 #include <string>
 #include <vector>
 
@@ -55,6 +56,7 @@ struct ChannelHandle;
 
 namespace gpu {
 class GpuChannel;
+class GpuChannelDeleter;
 class GpuChannelManagerDelegate;
 class GpuMemoryBufferFactory;
 class GpuWatchdogThread;
@@ -165,6 +167,7 @@ class GPU_EXPORT GpuChannelManager {
   void InternalDestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id, int client_id);
   void InternalDestroyGpuMemoryBufferOnIO(gfx::GpuMemoryBufferId id,
                                           int client_id);
+  void RunChannelDeleter();
 #if defined(OS_ANDROID)
   void ScheduleWakeUpGpu();
   void DoWakeUpGpu();
@@ -199,6 +202,9 @@ class GPU_EXPORT GpuChannelManager {
   base::TimeTicks begin_wake_up_time_;
 #endif
 
+  bool channel_deleter_running_ = false;
+  std::queue<std::unique_ptr<GpuChannelDeleter>> pending_deleters_;
+
   // Set during intentional GPU process shutdown.
   bool exiting_for_lost_context_;