Use proper namespace in skia/ext

ui/base/clipboard/clipboard_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 "ui/base/clipboard/clipboard_mac.h"
 
 #import <Cocoa/Cocoa.h>
 #include <stdint.h>
 
 #include <limits>
@@ skipping 311 matching lines @@
             initWithContentsOfURL:[NSURL fileURLWithPath:[paths lastObject]]]);
       }
     } else {
       image.reset([[NSImage alloc] initWithPasteboard:pb]);
     }
   } @catch (id exception) {
   }
 
   SkBitmap bitmap;
   if (image.get()) {
-    bitmap = gfx::NSImageToSkBitmapWithColorSpace(
+    bitmap = skia::NSImageToSkBitmapWithColorSpace(
         image.get(), /*is_opaque=*/ false, base::mac::GetSystemColorSpace());
   }
   return bitmap;
 }
 
 void ClipboardMac::ReadCustomData(ClipboardType clipboard_type,
                                   const base::string16& type,
                                   base::string16* result) const {
   DCHECK(CalledOnValidThread());
   DCHECK_EQ(clipboard_type, CLIPBOARD_TYPE_COPY_PASTE);
@@ skipping 90 matching lines @@
 
   NSPasteboard* pb = GetPasteboard();
   // passing UTIs into the pasteboard methods is valid >= 10.5
   [pb addTypes:[NSArray arrayWithObjects:NSURLPboardType, kUTTypeURLName, nil]
          owner:nil];
   [nsurl writeToPasteboard:pb];
   [pb setString:title forType:kUTTypeURLName];
 }
 
 void ClipboardMac::WriteBitmap(const SkBitmap& bitmap) {
-  NSImage* image = gfx::SkBitmapToNSImageWithColorSpace(
+  NSImage* image = skia::SkBitmapToNSImageWithColorSpace(
       bitmap, base::mac::GetSystemColorSpace());
   // An API to ask the NSImage to write itself to the clipboard comes in 10.6 :(
   // For now, spit out the image as a TIFF.
   NSPasteboard* pb = GetPasteboard();
   [pb addTypes:[NSArray arrayWithObject:NSTIFFPboardType] owner:nil];
   NSData* tiff_data = [image TIFFRepresentation];
   LOG_IF(ERROR, tiff_data == NULL) << "Failed to allocate image for clipboard";
   if (tiff_data) {
     [pb setData:tiff_data forType:NSTIFFPboardType];
   }
@@ skipping 11 matching lines @@
 // Write an extra flavor that signifies WebKit was the last to modify the
 // pasteboard. This flavor has no data.
 void ClipboardMac::WriteWebSmartPaste() {
   NSPasteboard* pb = GetPasteboard();
   NSString* format = GetWebKitSmartPasteFormatType().ToNSString();
   [pb addTypes:[NSArray arrayWithObject:format] owner:nil];
   [pb setData:nil forType:format];
 }
 
 }  // namespace ui