view shouldn't be opaque. allows webpages to show up. [not part of build]

embedding/browser/cocoa/src/NSBrowserView.h

@@ -100,7 +100,6 @@ enum {
 - (id)initWithFrame:(NSRect)frame;
 - (void)dealloc;
 - (void)setFrame:(NSRect)frameRect;
-- (BOOL)isOpaque;
 
 // nsIWebBrowser methods
 - (void)addListener:(id <NSBrowserListener>)listener;

embedding/browser/cocoa/src/NSBrowserView.mm

@@ -628,11 +628,6 @@ nsCocoaBrowserListener::SetContainer(id <NSBrowserContainer> aContainer)
   }
 }
 
-- (BOOL)isOpaque
-{
-  return YES;
-}
-
 - (void)addListener:(id <NSBrowserListener>)listener
 {
   _listener->AddListener(listener);