Rename WebCore namespace to blink in Platform

Source/platform/scroll/ScrollbarThemeMacCommon.mm

 /*
  * Copyright (C) 2008, 2011 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 35 matching lines @@
 #include "public/platform/Platform.h"
 #include "public/platform/WebRect.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "wtf/HashSet.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/TemporaryChange.h"
 
 // FIXME: There are repainting problems due to Aqua scroll bar buttons' visual overflow.
 
 using namespace std;
-using namespace WebCore;
+using namespace blink;
 
 @interface NSColor (WebNSColorDetails)
 + (NSImage *)_linenPatternImage;
 @end
 
-namespace WebCore {
+namespace blink {
 
 typedef HashSet<ScrollbarThemeClient*> ScrollbarSet;
 
 static ScrollbarSet& scrollbarSet()
 {
     DEFINE_STATIC_LOCAL(ScrollbarSet, set, ());
     return set;
 }
 
 static float gInitialButtonDelay = 0.5f;
@@ skipping 281 matching lines @@
 
 // static
 bool ScrollbarThemeMacCommon::isOverlayAPIAvailable()
 {
     static bool apiAvailable =
         [NSClassFromString(@"NSScrollerImp") respondsToSelector:@selector(scrollerImpWithStyle:controlSize:horizontal:replacingScrollerImp:)]
         && [NSClassFromString(@"NSScrollerImpPair") instancesRespondToSelector:@selector(scrollerStyle)];
     return apiAvailable;
 }
 
-} // namespace WebCore
+} // namespace blink