gpu: Add GpuFence framework.

gpu/command_buffer/tests/gl_manager.h

Index: gpu/command_buffer/tests/gl_manager.h
diff --git a/gpu/command_buffer/tests/gl_manager.h b/gpu/command_buffer/tests/gl_manager.h
index aa8a49acb0812f2316c17e770b2d937fdfa29b33..0639685b05b33702f4b70aaa9d152a7f033135f8 100644
--- a/gpu/command_buffer/tests/gl_manager.h
+++ b/gpu/command_buffer/tests/gl_manager.h
@@ -17,6 +17,7 @@
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_fence.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace base {
@@ -35,6 +36,7 @@ namespace gpu {
 
 class CommandBufferService;
 class CommandExecutor;
+class FenceFactory;
 class ImageFactory;
 class SyncPointClient;
 class SyncPointOrderData;
@@ -82,6 +84,8 @@ class GLManager : private GpuControl {
     bool backbuffer_alpha;
     // The ImageFactory to use to generate images for the backbuffer.
     gpu::ImageFactory* image_factory;
+    // The FenceFactory to use to generate fences.
+    gpu::FenceFactory* fence_factory;
     // Whether to preserve the backbuffer after a call to SwapBuffers().
     bool preserve_backbuffer;
   };
@@ -92,6 +96,8 @@ class GLManager : private GpuControl {
       const gfx::Size& size,
       gfx::BufferFormat format);
 
+  std::unique_ptr<gfx::GpuFence> CreateGpuFence();
+
   void Initialize(const Options& options);
   void InitializeWithCommandLine(const Options& options,
                                  const base::CommandLine& command_line);
@@ -152,6 +158,8 @@ class GLManager : private GpuControl {
   void SignalSyncToken(const gpu::SyncToken& sync_token,
                        const base::Closure& callback) override;
   bool CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) override;
+  int32_t CreateFence(ClientFence fence) override;
+  void DestroyFence(int32_t id) override;
 
  private:
   void PumpCommands();