Use proper namespace in skia/ext

chrome/browser/ui/cocoa/extensions/toolbar_actions_bar_bubble_mac.mm

 // Copyright 2015 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.
 
 #import "chrome/browser/ui/cocoa/extensions/toolbar_actions_bar_bubble_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #import "chrome/browser/ui/cocoa/info_bubble_view.h"
 #import "chrome/browser/ui/cocoa/info_bubble_window.h"
@@ skipping 61 matching lines @@
   if ((self = [super initWithWindow:window
                        parentWindow:parentWindow
                          anchoredAt:anchorPoint])) {
     acknowledged_ = NO;
     delegate_ = delegate.Pass();
 
     ui::NativeTheme* nativeTheme = ui::NativeThemeMac::instance();
     [[self bubble] setAlignment:info_bubble::kAlignArrowToAnchor];
     [[self bubble] setArrowLocation:info_bubble::kTopRight];
     [[self bubble] setBackgroundColor:
-        gfx::SkColorToCalibratedNSColor(nativeTheme->GetSystemColor(
+        skia::SkColorToCalibratedNSColor(nativeTheme->GetSystemColor(
             ui::NativeTheme::kColorId_DialogBackground))];
 
     if (!g_animations_enabled)
       [window setAllowedAnimations:info_bubble::kAnimateNone];
 
     [self layout];
 
     [[self window] makeFirstResponder:
         (actionButton_ ? actionButton_ : dismissButton_)];
   }
@@ skipping 239 matching lines @@
   } else {
     DCHECK_EQ(sender, actionButton_);
     action = ToolbarActionsBarBubbleDelegate::CLOSE_EXECUTE;
   }
   acknowledged_ = YES;
   delegate_->OnBubbleClosed(action);
   [self close];
 }
 
 @end