cc: Drop ContextProvider references on the impl thread before quitting

cc/output/gl_renderer.h

 // Copyright 2010 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_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include "base/cancelable_callback.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_vector.h"
@@ skipping 15 matching lines @@
 namespace WebKit { class WebGraphicsContext3D; }
 
 namespace cc {
 
 class GLRendererShaderTest;
 class OutputSurface;
 class PictureDrawQuad;
 class ScopedResource;
 class StreamVideoDrawQuad;
 class TextureDrawQuad;
+class TextureMailboxDeleter;
 class GeometryBinding;
 class ScopedEnsureFramebufferAllocation;
 
 // Class that handles drawing of composited render layers using GL.
 class CC_EXPORT GLRenderer : public DirectRenderer {
  public:
-  static scoped_ptr<GLRenderer> Create(RendererClient* client,
-                                       const LayerTreeSettings* settings,
-                                       OutputSurface* output_surface,
-                                       ResourceProvider* resource_provider,
-                                       int highp_threshold_min,
-                                       bool use_skia_gpu_backend);
+  static scoped_ptr<GLRenderer> Create(
+      RendererClient* client,
+      const LayerTreeSettings* settings,
+      OutputSurface* output_surface,
+      ResourceProvider* resource_provider,
+      TextureMailboxDeleter* texture_mailbox_deleter,
+      int highp_threshold_min,
+      bool use_skia_gpu_backend);
 
   virtual ~GLRenderer();
 
   virtual const RendererCapabilities& Capabilities() const OVERRIDE;
 
   WebKit::WebGraphicsContext3D* Context();
 
   virtual void ViewportChanged() OVERRIDE;
 
   // Waits for rendering to finish.
@@ skipping 20 matching lines @@
                           int line);
 
   bool CanUseSkiaGPUBackend() const;
   void LazyLabelOffscreenContext(ContextProvider* offscreen_context_provider);
 
  protected:
   GLRenderer(RendererClient* client,
              const LayerTreeSettings* settings,
              OutputSurface* output_surface,
              ResourceProvider* resource_provider,
+             TextureMailboxDeleter* texture_mailbox_deleter,
              int highp_threshold_min);
 
   bool IsBackbufferDiscarded() const { return is_backbuffer_discarded_; }
   bool Initialize();
   void InitializeGrContext();
 
   const gfx::QuadF& SharedGeometryQuad() const { return shared_geometry_quad_; }
   const GeometryBinding* SharedGeometry() const {
     return shared_geometry_.get();
   }
@@ skipping 320 matching lines @@
 
   scoped_ptr<DebugBorderProgram> debug_border_program_;
   scoped_ptr<SolidColorProgram> solid_color_program_;
   scoped_ptr<SolidColorProgramAA> solid_color_program_aa_;
 
   WebKit::WebGraphicsContext3D* context_;
 
   skia::RefPtr<GrContext> gr_context_;
   skia::RefPtr<SkCanvas> sk_canvas_;
 
+  TextureMailboxDeleter* texture_mailbox_deleter_;
+
   gfx::Rect swap_buffer_rect_;
   gfx::Rect scissor_rect_;
   gfx::Rect viewport_;
   bool is_backbuffer_discarded_;
   bool discard_backbuffer_when_not_visible_;
   bool is_using_bind_uniform_;
   bool visible_;
   bool is_scissor_enabled_;
   bool stencil_shadow_;
   bool blend_shadow_;
@@ skipping 24 matching lines @@
 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 #define GLC(context, x)                                                        \
   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 #else
 #define GLC(context, x) (x)
 #endif
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_