aw: Fix FBO restore bug

android_webview/browser/surfaces_instance.h

 // Copyright 2016 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 ANDROID_WEBVIEW_BROWSER_SURFACES_INSTANCE_H_
 #define ANDROID_WEBVIEW_BROWSER_SURFACES_INSTANCE_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 18 matching lines @@
 namespace android_webview {
 
 class AwGLSurface;
 class ParentOutputSurface;
 class ScopedAppGLStateRestore;
 
 class SurfacesInstance : public base::RefCounted<SurfacesInstance>,
                          public cc::DisplayClient,
                          public cc::SurfaceFactoryClient {
  public:
-  static scoped_refptr<SurfacesInstance> GetOrCreateInstance();
+  static scoped_refptr<SurfacesInstance> GetOrCreateInstance(
+      int framebuffer_binding_ext);
 
   std::unique_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator();
   cc::SurfaceManager* GetSurfaceManager();
   void SetBackingFrameBufferObject(int framebuffer_binding_ext);
 
   void DrawAndSwap(const gfx::Size& viewport,
                    const gfx::Rect& clip,
                    const gfx::Transform& transform,
                    const gfx::Size& frame_size,
                    const cc::SurfaceId& child_id,
                    const ScopedAppGLStateRestore& gl_state);
 
   void AddChildId(const cc::SurfaceId& child_id);
   void RemoveChildId(const cc::SurfaceId& child_id);
 
  private:
   friend class base::RefCounted<SurfacesInstance>;
 
-  SurfacesInstance();
+  explicit SurfacesInstance(int framebuffer_binding_ext);
   ~SurfacesInstance() override;
 
   // cc::DisplayClient overrides.
   void DisplayOutputSurfaceLost() override {}
   void DisplaySetMemoryPolicy(const cc::ManagedMemoryPolicy& policy) override {}
 
   // cc::SurfaceFactoryClient implementation.
   void ReturnResources(const cc::ReturnedResourceArray& resources) override;
   void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
 
@@ skipping 12 matching lines @@
 
   // This is owned by |display_|.
   ParentOutputSurface* output_surface_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesInstance);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_SURFACES_INSTANCE_H_