Update references to Blink's Platform API headers

chrome/renderer/safe_browsing/phishing_dom_feature_extractor_browsertest.cc

 // Copyright (c) 2012 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.
 //
 // Note that although this is not a "browser" test, it runs as part of
 // browser_tests.  This is because WebKit does not work properly if it is
 // shutdown and re-initialized.  Since browser_tests runs each test in a
 // new process, this avoids the problem.
 
 #include "chrome/renderer/safe_browsing/phishing_dom_feature_extractor.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/time.h"
 #include "chrome/renderer/safe_browsing/features.h"
 #include "chrome/renderer/safe_browsing/mock_feature_extractor_clock.h"
 #include "chrome/renderer/safe_browsing/test_utils.h"
 #include "content/public/test/render_view_fake_resources_test.h"
 #include "testing/gmock/include/gmock/gmock.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
+#include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebScriptSource.h"
 
 using ::testing::DoAll;
 using ::testing::Invoke;
 using ::testing::Return;
 
 namespace safe_browsing {
 
 class PhishingDOMFeatureExtractorTest
@@ skipping 360 matching lines @@
   expected_features.AddBooleanFeature(features::kPageHasForms);
   expected_features.AddBooleanFeature(features::kPageHasPswdInputs);
 
   FeatureMap features;
   LoadURL("http://host.com/");
   ASSERT_TRUE(ExtractFeatures(&features));
   ExpectFeatureMapsAreEqual(features, expected_features);
 }
 
 }  // namespace safe_browsing