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

mojo/public/cpp/bindings/tests/wtf_hash_unittest.cc

 // 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.
 
 #include "mojo/public/cpp/bindings/lib/wtf_hash_util.h"
 
 #include "mojo/public/interfaces/bindings/tests/test_structs.mojom-blink.h"
 #include "mojo/public/interfaces/bindings/tests/test_wtf_types.mojom-blink.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/WebKit/Source/wtf/HashFunctions.h"
+#include "third_party/WebKit/Source/platform/wtf/HashFunctions.h"
 
 namespace mojo {
 namespace test {
 namespace {
 
 using WTFHashTest = testing::Test;
 
 TEST_F(WTFHashTest, NestedStruct) {
   // Just check that this template instantiation compiles.
   ASSERT_EQ(::mojo::internal::Hash(
@@ skipping 30 matching lines @@
   // Nested in interface.
   ASSERT_EQ(WTF::DefaultHash<blink::TestWTF::NestedEnum>::Hash().GetHash(
                 blink::TestWTF::NestedEnum::E0),
             WTF::DefaultHash<blink::TestWTF::NestedEnum>::Hash().GetHash(
                 blink::TestWTF::NestedEnum::E0));
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo