Fix crash caused by concurrent access to framebuffer_combo_complete_map_.

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index 9bf440a17d03b18bd3491e859bd90c93f7108c0f..04325847146720f9c68478485e064d16f384f56c 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -18,6 +18,7 @@
 namespace gpu {
 namespace gles2 {
 
+class FramebufferCompletenessCache;
 class FramebufferManager;
 class Renderbuffer;
 class RenderbufferManager;
@@ -156,12 +157,6 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
   // formats.
   bool HasSameInternalFormatsMRT() const;
 
-  static void ClearFramebufferCompleteComboMap();
-
-  static bool AllowFramebufferComboCompleteMapForTesting() {
-    return allow_framebuffer_combo_complete_map_;
-  }
-
   void OnTextureRefDetached(TextureRef* texture);
   void OnWillRenderTo() const;
   void OnDidRenderTo() const;
@@ -217,12 +212,6 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
   typedef base::hash_map<GLenum, scoped_refptr<Attachment> > AttachmentMap;
   AttachmentMap attachments_;
 
-  // A map of successful frame buffer combos. If it's in the map
-  // it should be FRAMEBUFFER_COMPLETE.
-  typedef base::hash_map<std::string, bool> FramebufferComboCompleteMap;
-  static FramebufferComboCompleteMap* framebuffer_combo_complete_map_;
-  static bool allow_framebuffer_combo_complete_map_;
-
   scoped_ptr<GLenum[]> draw_buffers_;
 
   GLenum read_buffer_;
@@ -258,8 +247,11 @@ class GPU_EXPORT FramebufferManager {
     DISALLOW_COPY_AND_ASSIGN(TextureDetachObserver);
   };
 
-  FramebufferManager(uint32 max_draw_buffers, uint32 max_color_attachments,
-                     ContextGroup::ContextType context_type);
+  FramebufferManager(uint32 max_draw_buffers,
+                     uint32 max_color_attachments,
+                     ContextGroup::ContextType context_type,
+                     const scoped_refptr<FramebufferCompletenessCache>&
+                         framebuffer_combo_complete_cache);
   ~FramebufferManager();
 
   // Must call before destruction.
@@ -316,6 +308,10 @@ class GPU_EXPORT FramebufferManager {
 
   void OnTextureRefDetached(TextureRef* texture);
 
+  FramebufferCompletenessCache* GetFramebufferComboCompleteCache() {
+    return framebuffer_combo_complete_cache_.get();
+  }
+
   // Info for each framebuffer in the system.
   typedef base::hash_map<GLuint, scoped_refptr<Framebuffer> >
       FramebufferMap;
@@ -339,6 +335,8 @@ class GPU_EXPORT FramebufferManager {
   typedef std::vector<TextureDetachObserver*> TextureDetachObserverVector;
   TextureDetachObserverVector texture_detach_observers_;
 
+  scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };