Use proper namespace in skia/ext

ui/app_list/cocoa/apps_grid_view_item.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/apps_grid_view_item.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 155 matching lines @@
 
 // Ignore all hit tests. The grid controller needs to be the owner of any drags.
 - (NSView*)hitTest:(NSPoint)aPoint {
   return nil;
 }
 
 - (void)drawRect:(NSRect)dirtyRect {
   if (!selected_)
     return;
 
-  [gfx::SkColorToSRGBNSColor(app_list::kSelectedColor) set];
+  [skia::SkColorToSRGBNSColor(app_list::kSelectedColor) set];
   NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
 }
 
 - (void)mouseDown:(NSEvent*)theEvent {
   [[[self button] cell] setHighlighted:YES];
 }
 
 - (void)mouseDragged:(NSEvent*)theEvent {
   NSPoint pointInView = [self convertPoint:[theEvent locationInWindow]
                                   fromView:nil];
@@ skipping 49 matching lines @@
   [paragraphStyle setLineBreakMode:NSLineBreakByTruncatingTail];
   [paragraphStyle setAlignment:NSCenterTextAlignment];
   NSDictionary* titleAttributes = @{
     NSParagraphStyleAttributeName : paragraphStyle,
     NSFontAttributeName : ui::ResourceBundle::GetSharedInstance()
                               .GetFontList(app_list::kItemTextFontStyle)
                               .DeriveWithSizeDelta(kMacFontSizeDelta)
                               .GetPrimaryFont()
                               .GetNativeFont(),
     NSForegroundColorAttributeName :
-        gfx::SkColorToSRGBNSColor(app_list::kGridTitleColor)
+        skia::SkColorToSRGBNSColor(app_list::kGridTitleColor)
   };
   NSString* buttonTitle =
       base::SysUTF8ToNSString([self model]->GetDisplayName());
   base::scoped_nsobject<NSAttributedString> attributedTitle(
       [[NSAttributedString alloc] initWithString:buttonTitle
                                       attributes:titleAttributes]);
   [[self button] setAttributedTitle:attributedTitle];
 
   // If the display name would be truncated in the NSButton, or if the display
   // name differs from the full name, add a tooltip showing the full name.
@@ skipping 188 matching lines @@
 }
 
 // Workaround for http://crbug.com/324365: AppKit in Mavericks tries to call
 // - [NSButtonCell item] when inspecting accessibility. Without this, an
 // unrecognized selector exception is thrown inside AppKit, crashing Chrome.
 - (id)item {
   return nil;
 }
 
 @end