ContextProvider in OutputSurface

cc/output/context_provider.h

 // Copyright (c) 2013 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 CC_OUTPUT_CONTEXT_PROVIDER_H_
 #define CC_OUTPUT_CONTEXT_PROVIDER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 
 class GrContext;
 namespace WebKit { class WebGraphicsContext3D; }
 
 namespace cc {
+struct ManagedMemoryPolicy;
 
 class ContextProvider : public base::RefCountedThreadSafe<ContextProvider> {
  public:
   // Bind the 3d context to the current thread. This should be called before
   // accessing the contexts. Calling it more than once should have no effect.
   // Once this function has been called, the class should only be accessed
   // from the same thread.
   virtual bool BindToCurrentThread() = 0;
 
   virtual WebKit::WebGraphicsContext3D* Context3d() = 0;
   virtual class GrContext* GrContext() = 0;
 
   // Ask the provider to check if the contexts are valid or lost. If they are,
   // this should invalidate the provider so that it can be replaced with a new
   // one.
   virtual void VerifyContexts() = 0;
 
   // A method to be called from the main thread that should return true if
   // the context inside the provider is no longer valid.
   virtual bool DestroyedOnMainThread() = 0;
 
   // Sets a callback to be called when the context is lost. This should be
   // called from the same thread that the context is bound to. To avoid races,
   // it should be called before BindToCurrentThread(), or VerifyContexts()
   // should be called after setting the callback.
   typedef base::Closure LostContextCallback;
   virtual void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) = 0;
 
+  // Sets a callback to be called when the context is lost. This should be
+  // called from the same thread that the context is bound to.
+  typedef base::Closure SwapBuffersCompleteCallback;
+  virtual void SetSwapBuffersCompleteCallback(
+      const SwapBuffersCompleteCallback& swap_buffers_complete_callback) = 0;
+
+  // Sets a callback to be called when the memory policy changes. This should be
+  // called from the same thread that the context is bound to.
+  typedef base::Callback<void(
+    const cc::ManagedMemoryPolicy& policy,
+    bool discard_backbuffer_when_not_visible)> MemoryPolicyChangedCallback;
+  virtual void SetMemoryPolicyChangedCallback(
+      const MemoryPolicyChangedCallback& memory_policy_changed_callback) = 0;
+
  protected:
   friend class base::RefCountedThreadSafe<ContextProvider>;
   virtual ~ContextProvider() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_CONTEXT_PROVIDER_H_