Update some #includes in chrome/renderer/autofill/ for headers in the new Platform directory

chrome/renderer/autofill/autofill_renderer_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.
 
 #include "base/utf_string_conversions.h"
 #include "chrome/common/autofill_messages.h"
 #include "chrome/common/form_data.h"
 #include "chrome/common/form_field_data.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputElement.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
 
 using WebKit::WebDocument;
 using WebKit::WebFrame;
 using WebKit::WebInputElement;
 using WebKit::WebString;
 
 namespace autofill {
 
 TEST_F(ChromeRenderViewTest, SendForms) {
   // Don't want any delay for form state sync changes. This will still post a
@@ skipping 189 matching lines @@
   autofill_agent_->InputElementClicked(middlename, true, true);
   const IPC::Message* message2 = render_thread_->sink().GetFirstMessageMatching(
       AutofillHostMsg_QueryFormFieldAutofill::ID);
   ASSERT_NE(static_cast<IPC::Message*>(NULL), message2);
   // TODO(isherman): It would be nice to verify here that the message includes
   // the correct data.  I'm not sure how to extract that information from an
   // IPC::Message though.
 }
 
 }  // namespace autofill