Rewrite references to "wtf/" to "platform/wtf/" in //mojo.

mojo/public/cpp/bindings/lib/wtf_hash_util.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 MOJO_PUBLIC_CPP_BINDINGS_LIB_WTF_HASH_UTIL_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_WTF_HASH_UTIL_H_
 
 #include <type_traits>
 
 #include "mojo/public/cpp/bindings/lib/hash_util.h"
 #include "mojo/public/cpp/bindings/struct_ptr.h"
-#include "third_party/WebKit/Source/wtf/HashFunctions.h"
-#include "third_party/WebKit/Source/wtf/text/StringHash.h"
-#include "third_party/WebKit/Source/wtf/text/WTFString.h"
+#include "third_party/WebKit/Source/platform/wtf/HashFunctions.h"
+#include "third_party/WebKit/Source/platform/wtf/text/StringHash.h"
+#include "third_party/WebKit/Source/platform/wtf/text/WTFString.h"
 
 namespace mojo {
 namespace internal {
 
 template <typename T>
 size_t WTFHashCombine(size_t seed, const T& value) {
   // Based on proposal in:
   // http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
   //
   // TODO(tibell): We'd like to use WTF::DefaultHash instead of std::hash, but
@@ skipping 98 matching lines @@
   }
   static bool IsDeletedValue(const mojo::InlinedStructPtr<T>& value) {
     return mojo::internal::InlinedStructPtrWTFHelper<
         T>::IsHashTableDeletedValue(value);
   }
 };
 
 }  // namespace WTF
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_WTF_HASH_UTIL_H_