Fix window shadows.

content/browser/renderer_host/accelerated_plugin_view_mac.mm

Index: content/browser/renderer_host/accelerated_plugin_view_mac.mm
diff --git a/content/browser/renderer_host/accelerated_plugin_view_mac.mm b/content/browser/renderer_host/accelerated_plugin_view_mac.mm
index aeb86c9bad63bde385495168333b163d3f3f03dc..a0a1a4e3bf4d09113fe5ba40cfff892dc6f78a7b 100644
--- a/content/browser/renderer_host/accelerated_plugin_view_mac.mm
+++ b/content/browser/renderer_host/accelerated_plugin_view_mac.mm
@@ -180,31 +180,6 @@ using content::BrowserThread;
   [glContext_ makeCurrentContext];
 }
 
-- (void)viewWillMoveToWindow:(NSWindow*)newWindow {
-  TRACE_EVENT1("browser", "AcceleratedPluginView::viewWillMoveToWindow",
-               "newWindow", newWindow);
-  // Inform the window hosting this accelerated view that it needs to be
-  // transparent.
-  if (![self isHiddenOrHasHiddenAncestor]) {
-    if ([[self window] conformsToProtocol:@protocol(UnderlayableSurface)]) {
-      [static_cast<id<UnderlayableSurface> >([self window])
-          underlaySurfaceRemoved];
-    }
-    if ([newWindow conformsToProtocol:@protocol(UnderlayableSurface)])
-      [static_cast<id<UnderlayableSurface> >(newWindow) underlaySurfaceAdded];
-  }
-}
-
-- (void)viewDidHide {
-  TRACE_EVENT0("browser", "AcceleratedPluginView::viewDidHide");
-  [super viewDidHide];
-
-  if ([[self window] conformsToProtocol:@protocol(UnderlayableSurface)]) {
-    [static_cast<id<UnderlayableSurface> >([self window])
-        underlaySurfaceRemoved];
-  }
-}
-
 - (void)viewDidUnhide {
   TRACE_EVENT0("browser", "AcceleratedPluginView::viewDidUnhide");
   [super viewDidUnhide];
@@ -213,10 +188,6 @@ using content::BrowserThread;
   if (renderWidgetHostView_ && !glContext_) {
     [self initOpenGLContext];
   }
-
-  if ([[self window] conformsToProtocol:@protocol(UnderlayableSurface)]) {
-    [static_cast<id<UnderlayableSurface> >([self window]) underlaySurfaceAdded];
-  }
 }
 
 - (BOOL)acceptsFirstResponder {