Refactor client visibility handling

blimp/client/support/compositor/blimp_context_provider.h

Index: blimp/client/support/compositor/blimp_context_provider.h
diff --git a/blimp/client/support/compositor/blimp_context_provider.h b/blimp/client/support/compositor/blimp_context_provider.h
index 034caf23623e5749281ed3f41adde2060498eb99..75112ed1c213a5f8be4d0bf2070ad7903989a123 100644
--- a/blimp/client/support/compositor/blimp_context_provider.h
+++ b/blimp/client/support/compositor/blimp_context_provider.h
@@ -37,9 +37,9 @@ class BlimpContextProvider : 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;
   base::Lock* GetLock() override;
-  void DeleteCachedResources() override;
   void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) override;
 
@@ -56,6 +56,7 @@ class BlimpContextProvider : public cc::ContextProvider {
 
   std::unique_ptr<gpu::GLInProcessContext> context_;
   std::unique_ptr<skia_bindings::GrContextForGLES2Interface> gr_context_;
+  std::unique_ptr<cc::ContextCacheController> cache_controller_;
 
   LostContextCallback lost_context_callback_;