Use proper namespace in skia/ext

ui/native_theme/native_theme_mac.mm

 // Copyright (c) 2013 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 "ui/native_theme/native_theme_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/mac/mac_util.h"
@@ skipping 78 matching lines @@
 // list is just populated with class methods on NSColor.
 SkColor NSSystemColorToSkColor(NSColor* color) {
   if (base::mac::IsOSMountainLionOrEarlier())
     return GetSystemColorUsingSwatch(color);
 
   // System colors use the an NSNamedColorSpace called "System", so first step
   // is to convert the color into something that can be worked with.
   NSColor* device_color =
       [color colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
   if (device_color)
-    return gfx::NSDeviceColorToSkColor(device_color);
+    return skia::NSDeviceColorToSkColor(device_color);
 
   // Sometimes the conversion is not possible, but we can get an approximation
   // by going through a CGColorRef. Note that simply using NSColor methods for
   // accessing components for system colors results in exceptions like
   // "-numberOfComponents not valid for the NSColor NSNamedColorSpace System
   // windowBackgroundColor; need to first convert colorspace." Hence the
   // conversion first to CGColor.
   CGColorRef cg_color = [color CGColor];
   const size_t component_count = CGColorGetNumberOfComponents(cg_color);
   if (component_count == 4)
-    return gfx::CGColorRefToSkColor(cg_color);
+    return skia::CGColorRefToSkColor(cg_color);
 
   CHECK(component_count == 1 || component_count == 2);
   // 1-2 components means a grayscale channel and maybe an alpha channel, which
   // CGColorRefToSkColor will not like. But RGB is additive, so the conversion
   // is easy (RGB to grayscale is less easy).
   const CGFloat* components = CGColorGetComponents(cg_color);
   CGFloat alpha = component_count == 2 ? components[1] : 1.0;
   return SkColorSetARGB(SkScalarRoundToInt(255.0 * alpha),
                         SkScalarRoundToInt(255.0 * components[0]),
                         SkScalarRoundToInt(255.0 * components[0]),
@@ skipping 287 matching lines @@
   set_scrollbar_button_length(0);
   SetScrollbarColors(kScrollerThumbColor,
                      kScrollerThumbHoverColor,
                      kScrollerTrackGradientColors[0]);
 }
 
 NativeThemeMac::~NativeThemeMac() {
 }
 
 }  // namespace ui