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

content/renderer/mhtml_generator.cc

 // Copyright (c) 2011 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 "content/renderer/mhtml_generator.h"
 
 #include "base/platform_file.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/render_view_impl.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCString.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebCString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageSerializer.h"
 
 namespace content {
 
 MHTMLGenerator::MHTMLGenerator(RenderViewImpl* render_view)
     : RenderViewObserver(render_view),
       file_(base::kInvalidPlatformFileValue) {
 }
 
 MHTMLGenerator::~MHTMLGenerator() {
@@ skipping 39 matching lines @@
                                                 data + total_bytes_written,
                                                 copy_size);
     if (bytes_written == -1)
       return -1;
     total_bytes_written += bytes_written;
   }
   return total_bytes_written;
 }
 
 }  // namespace content