GLContext: Remove WasDirtiedExternally methods

ui/gl/gl_context.h

Index: ui/gl/gl_context.h
diff --git a/ui/gl/gl_context.h b/ui/gl/gl_context.h
index 2b4ec0e660920e68bead1121508f5ad90b57731b..87c3f8d76f0ca50698a791bc9dc7fc608eb34dcb 100644
--- a/ui/gl/gl_context.h
+++ b/ui/gl/gl_context.h
@@ -127,14 +127,6 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
   // Returns the GL renderer string. The context must be current.
   virtual std::string GetGLRenderer();
 
-  // Return a callback that, when called, indicates that the state the
-  // underlying context has been changed by code outside of the command buffer,
-  // and will need to be restored.
-  virtual base::Closure GetStateWasDirtiedExternallyCallback();
-
-  // Restore the context's state if it was dirtied by an external caller.
-  virtual void RestoreStateIfDirtiedExternally();
-
  protected:
   virtual ~GLContext();
 
@@ -164,9 +156,6 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
 
   virtual void OnSetSwapInterval(int interval) = 0;
 
-  bool GetStateWasDirtiedExternally() const;
-  void SetStateWasDirtiedExternally(bool dirtied_externally);
-
  private:
   friend class base::RefCounted<GLContext>;
 
@@ -183,8 +172,6 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
   int swap_interval_;
   bool force_swap_interval_zero_;
 
-  base::CancelableCallback<void()> state_dirtied_callback_;
-
   DISALLOW_COPY_AND_ASSIGN(GLContext);
 };