Fix window shadows.

content/browser/renderer_host/render_widget_host_view_mac.h

Index: content/browser/renderer_host/render_widget_host_view_mac.h
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.h b/content/browser/renderer_host/render_widget_host_view_mac.h
index 4df271b2e6d19eb955664da9e43a8abc1dd64a04..3e3dd3940b1f06a61e39a568012875f702406cb6 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -133,10 +133,6 @@ class RenderWidgetHostImpl;
 
   // recursive globalFrameDidChange protection:
   BOOL handlingGlobalFrameDidChange_;
-
-  // Set to YES once a GL context is attached to this NSView; never set back to
-  // NO.
-  BOOL hasGLContext_;
 }
 
 @property(nonatomic, readonly) NSRange selectedRange;
@@ -158,9 +154,6 @@ class RenderWidgetHostImpl;
 // Evaluates the event in the context of plugin IME, if plugin IME is enabled.
 // Returns YES if the event was handled.
 - (BOOL)postProcessEventForPluginIme:(NSEvent*)event;
-// Tell the view that a GL context was created and accelerated rendering may
-// ensue.
-- (void)addedGLContext;
 
 @end