Update references to Blink's Platform API headers

chrome/renderer/spellchecker/spellcheck_provider.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 "chrome/renderer/spellchecker/spellcheck_provider.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "chrome/common/spellcheck_result.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
 #include "content/public/renderer/render_view.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebVector.h"
+#include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCheckingCompletion.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCheckingResult.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCheckingType.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 
 using WebKit::WebFrame;
 using WebKit::WebString;
 using WebKit::WebTextCheckingCompletion;
 using WebKit::WebTextCheckingResult;
@@ skipping 315 matching lines @@
         results[i].length = last_results_[i].length;
         results[i].replacement = last_results_[i].replacement;
       }
       completion->didFinishCheckingText(results);
       return true;
     }
   }
 
   return false;
 }