WIP GPU scheduler + delayed activation / tile draw

gpu/ipc/service/gpu_command_buffer_stub.h

Index: gpu/ipc/service/gpu_command_buffer_stub.h
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.h b/gpu/ipc/service/gpu_command_buffer_stub.h
index 91b8dfe1c36ff3978808b7af5933d2ee276e8c31..72f5c9839f3b0705544fd4bdb3bd2a591ff5ad1f 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.h
+++ b/gpu/ipc/service/gpu_command_buffer_stub.h
@@ -20,8 +20,8 @@
 #include "gpu/command_buffer/common/command_buffer_id.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
+#include "gpu/command_buffer/common/preemption_flag.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
-#include "gpu/command_buffer/service/command_executor.h"
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/gpu_export.h"
 #include "gpu/ipc/common/surface_handle.h"
@@ -40,6 +40,8 @@
 namespace gpu {
 struct Mailbox;
 struct SyncToken;
+class CommandExecutor;
+class GpuScheduler;
 class SyncPointClient;
 }
 
@@ -69,12 +71,17 @@ class GPU_EXPORT GpuCommandBufferStub
   typedef base::Callback<void(const std::vector<ui::LatencyInfo>&)>
       LatencyInfoCallback;
 
+  static gpu::CommandBufferId GetCommandBufferID(int32_t channel_id,
+                                                 int32_t route_id);
+  static int32_t GetChannelID(gpu::CommandBufferId cmd_buffer_id);
+  static int32_t GetRouteID(gpu::CommandBufferId cmd_buffer_id);
+
   static std::unique_ptr<GpuCommandBufferStub> Create(
-    GpuChannel* channel,
-    GpuCommandBufferStub* share_group,
-    const GPUCreateCommandBufferConfig& init_params,
-    int32_t route_id,
-    std::unique_ptr<base::SharedMemory> shared_state_shm);
+      GpuChannel* channel,
+      GpuCommandBufferStub* share_group,
+      const GPUCreateCommandBufferConfig& init_params,
+      int32_t route_id,
+      std::unique_ptr<base::SharedMemory> shared_state_shm);
 
   ~GpuCommandBufferStub() override;
 
@@ -105,7 +112,6 @@ class GPU_EXPORT GpuCommandBufferStub
   bool HasUnprocessedCommands();
 
   gles2::GLES2Decoder* decoder() const { return decoder_.get(); }
-  CommandExecutor* scheduler() const { return executor_.get(); }
   GpuChannel* channel() const { return channel_; }
 
   // Unique command buffer ID for this command buffer stub.
@@ -217,6 +223,7 @@ class GPU_EXPORT GpuCommandBufferStub
   // are destroyed. So a raw pointer is safe.
   GpuChannel* const channel_;
 
+  GpuScheduler* scheduler_;
   // The group of contexts that share namespaces with this context.
   scoped_refptr<gles2::ContextGroup> context_group_;