Revert of [Ozone-GBM] Handle GPU crashes

ui/ozone/platform/dri/dri_window_delegate_proxy.h

Index: ui/ozone/platform/dri/dri_window_delegate_proxy.h
diff --git a/ui/ozone/platform/dri/dri_window_delegate_proxy.h b/ui/ozone/platform/dri/dri_window_delegate_proxy.h
index 9e0b1068b6c1c4acbbed44770f5bc7cfb1a61ce6..9ed90951df1c9738d4d71afbc7c2c8cc53d0d355 100644
--- a/ui/ozone/platform/dri/dri_window_delegate_proxy.h
+++ b/ui/ozone/platform/dri/dri_window_delegate_proxy.h
@@ -5,8 +5,6 @@
 #ifndef UI_OZONE_PLATFORM_DRI_DRI_WINDOW_DELEGATE_PROXY_H_
 #define UI_OZONE_PLATFORM_DRI_DRI_WINDOW_DELEGATE_PROXY_H_
 
-#include "ui/gfx/geometry/rect.h"
-#include "ui/ozone/platform/dri/channel_observer.h"
 #include "ui/ozone/platform/dri/dri_window_delegate.h"
 
 namespace ui {
@@ -15,8 +13,7 @@
 
 // This is used when running with a GPU process (or with the in-process GPU) to
 // IPC the native window configuration from the browser to the GPU.
-class DriWindowDelegateProxy : public DriWindowDelegate,
-                               public ChannelObserver {
+class DriWindowDelegateProxy : public DriWindowDelegate {
  public:
   DriWindowDelegateProxy(gfx::AcceleratedWidget widget,
                          GpuPlatformSupportHostGbm* sender);
@@ -29,16 +26,9 @@
   virtual HardwareDisplayController* GetController() OVERRIDE;
   virtual void OnBoundsChanged(const gfx::Rect& bounds) OVERRIDE;
 
-  // ChannelObserver:
-  virtual void OnChannelEstablished() OVERRIDE;
-  virtual void OnChannelDestroyed() OVERRIDE;
-
  private:
   gfx::AcceleratedWidget widget_;
   GpuPlatformSupportHostGbm* sender_;
-  gfx::Rect bounds_;
-  // Tracks if the connection is established or not.
-  bool has_connection_;
 
   DISALLOW_COPY_AND_ASSIGN(DriWindowDelegateProxy);
 };