Use proper namespace in skia/ext

ui/app_list/cocoa/app_list_pager_view.mm

 // Copyright 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.
 
 #import "ui/app_list/cocoa/app_list_pager_view.h"
 
 #include "base/mac/foundation_util.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
@@ skipping 129 matching lines @@
   [[NSBezierPath bezierPathWithRoundedRect:clipRect
                                    xRadius:kButtonCornerRadius
                                    yRadius:kButtonCornerRadius] addClip];
 
   AppListPagerView* pagerControl =
       base::mac::ObjCCastStrict<AppListPagerView>(controlView);
   SkColor backgroundColor = [pagerControl hoveredSegment] == segment ?
       app_list::kPagerHoverColor :
       app_list::kPagerNormalColor;
 
-  [gfx::SkColorToSRGBNSColor(backgroundColor) set];
+  [skia::SkColorToSRGBNSColor(backgroundColor) set];
   NSRectFill(frame);
 
   if (![[self target] conformsToProtocol:@protocol(AppListPagerDelegate)])
     return;
 
   CGFloat selectedRatio = [[self target] visiblePortionOfPage:segment];
   if (selectedRatio == 0.0)
     return;
 
-  [gfx::SkColorToSRGBNSColor(app_list::kPagerSelectedColor) set];
+  [skia::SkColorToSRGBNSColor(app_list::kPagerSelectedColor) set];
   if (selectedRatio < 0)
     frame.origin.x += frame.size.width + frame.size.width * selectedRatio;
   frame.size.width *= fabs(selectedRatio);
   NSRectFill(frame);
 }
 
 @end