gpu: Add sync token dependencies to flush metadata.

gpu/gles2_conform_support/egl/context.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_GLES2_CONFORM_TEST_CONTEXT_H_
 #define GPU_GLES2_CONFORM_TEST_CONTEXT_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 58 matching lines @@
   gpu::CommandBufferNamespace GetNamespaceID() const override;
   gpu::CommandBufferId GetCommandBufferID() const override;
   int32_t GetExtraCommandBufferData() const override;
   uint64_t GenerateFenceSyncRelease() override;
   bool IsFenceSyncRelease(uint64_t release) override;
   bool IsFenceSyncFlushed(uint64_t release) override;
   bool IsFenceSyncFlushReceived(uint64_t release) override;
   bool IsFenceSyncReleased(uint64_t release) override;
   void SignalSyncToken(const gpu::SyncToken& sync_token,
                        const base::Closure& callback) override;
-  bool CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) override;
+  void WaitSyncToken(const gpu::SyncToken& sync_token) override;
+  bool CanWaitUnverifiedSyncToken(const gpu::SyncToken& sync_token) override;
 
   // Called by ThreadState to set the needed global variables when this context
   // is current.
   void ApplyCurrentContext(gl::GLSurface* current_surface);
   static void ApplyContextReleased();
 
  private:
   friend class base::RefCountedThreadSafe<Context>;
   ~Context() override;
   bool CreateService(gl::GLSurface* gl_surface);
@@ skipping 20 matching lines @@
 
   scoped_refptr<gl::GLContext> gl_context_;
 
   std::unique_ptr<gpu::gles2::GLES2Interface> client_gl_context_;
   DISALLOW_COPY_AND_ASSIGN(Context);
 };
 
 }  // namespace egl
 
 #endif  // GPU_GLES2_CONFORM_TEST_CONTEXT_H_