Remove unused argument from WebContentsImpl::IsFullscreenForCurrentTab.

content/browser/renderer_host/render_widget_host_view_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 #include <stdint.h>
@@ skipping 408 matching lines @@
 bool RenderWidgetHostViewMac::DelegatedFrameHostIsVisible() const {
   return !render_widget_host_->is_hidden();
 }
 
 SkColor RenderWidgetHostViewMac::DelegatedFrameHostGetGutterColor(
     SkColor color) const {
   // When making an element on the page fullscreen the element's background
   // may not match the page's, so use black as the gutter color to avoid
   // flashes of brighter colors during the transition.
   if (render_widget_host_->delegate() &&
-      render_widget_host_->delegate()->IsFullscreenForCurrentTab(
-          render_widget_host_)) {
+      render_widget_host_->delegate()->IsFullscreenForCurrentTab()) {
     return SK_ColorBLACK;
   }
   return color;
 }
 
 gfx::Size RenderWidgetHostViewMac::DelegatedFrameHostDesiredSizeInDIP() const {
   return GetViewBounds().size();
 }
 
 bool RenderWidgetHostViewMac::DelegatedFrameCanCreateResizeLock() const {
@@ skipping 3015 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end