Move base/mac_util.h to base/mac and use the base::mac namespace....

chrome/browser/ui/cocoa/floating_bar_backing_view.mm

 // Copyright (c) 2010 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 "chrome/browser/ui/cocoa/floating_bar_backing_view.h"
 
-#include "base/mac_util.h"
+#include "base/mac/mac_util.h"
 #import "chrome/browser/ui/cocoa/browser_frame_view.h"
 
 @implementation FloatingBarBackingView
 
 - (void)drawRect:(NSRect)rect {
   NSWindow* window = [self window];
   BOOL isMainWindow = [window isMainWindow];
 
   if (isMainWindow)
     [[NSColor windowFrameColor] set];
@@ skipping 19 matching lines @@
 - (void)mouseMoved:(NSEvent*)event {}
 - (void)mouseDragged:(NSEvent*)event {}
 - (void)rightMouseDragged:(NSEvent*)event {}
 - (void)otherMouseDragged:(NSEvent*)event {}
 
 // Eat this too, except that ...
 - (void)mouseUp:(NSEvent*)event {
   // a double-click in the blank area should try to minimize, to be consistent
   // with double-clicks on the contiguous tab strip area. (It'll fail and beep.)
   if ([event clickCount] == 2 &&
-      mac_util::ShouldWindowsMiniaturizeOnDoubleClick())
+      base::mac::ShouldWindowsMiniaturizeOnDoubleClick())
     [[self window] performMiniaturize:self];
 }
 
 @end  // @implementation FloatingBarBackingView