Refactor client visibility handling

services/ui/surfaces/surfaces_context_provider.h

Index: services/ui/surfaces/surfaces_context_provider.h
diff --git a/services/ui/surfaces/surfaces_context_provider.h b/services/ui/surfaces/surfaces_context_provider.h
index 207d3db32cbfe1168a547e85b783dce95b297662..4d77d30b215833451b27646527a7238507eb9604 100644
--- a/services/ui/surfaces/surfaces_context_provider.h
+++ b/services/ui/surfaces/surfaces_context_provider.h
@@ -50,9 +50,9 @@ class SurfacesContextProvider : public cc::ContextProvider,
   gpu::gles2::GLES2Interface* ContextGL() override;
   gpu::ContextSupport* ContextSupport() override;
   class GrContext* GrContext() override;
+  cc::ContextCacheController* CacheController() override;
   void InvalidateGrContext(uint32_t state) override;
   gpu::Capabilities ContextCapabilities() override;
-  void DeleteCachedResources() override {}
   void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) override;
   base::Lock* GetLock() override;
@@ -79,6 +79,7 @@ class SurfacesContextProvider : public cc::ContextProvider,
   std::unique_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
   std::unique_ptr<gpu::TransferBuffer> transfer_buffer_;
   std::unique_ptr<gpu::gles2::GLES2Implementation> implementation_;
+  std::unique_ptr<cc::ContextCacheController> cache_controller_;
 
   gpu::Capabilities capabilities_;
   LostContextCallback lost_context_callback_;