Rewrite references to "wtf/" to "platform/wtf/" in the rest of platform/.

third_party/WebKit/Source/platform/graphics/CompositorElementId.h

 // Copyright 2016 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.
 
 #ifndef CompositorElementId_h
 #define CompositorElementId_h
 
 #include "cc/trees/element_id.h"
 #include "platform/PlatformExport.h"
-#include "wtf/HashFunctions.h"
-#include "wtf/HashSet.h"
-#include "wtf/HashTraits.h"
+#include "platform/wtf/HashFunctions.h"
+#include "platform/wtf/HashSet.h"
+#include "platform/wtf/HashTraits.h"
 
 namespace blink {
 
 enum class CompositorSubElementId {
   kPrimary,
   kScroll,
   kViewport,
   kLinkHighlight
 };
 
@@ skipping 27 matching lines @@
   }
 };
 
 using CompositorElementIdSet = HashSet<CompositorElementId,
                                        CompositorElementIdHash,
                                        CompositorElementIdHashTraits>;
 
 }  // namespace blink
 
 #endif  // CompositorElementId_h