Remove unnecessary utilities from drive::util.

chrome/browser/chromeos/drive/search_metadata.cc

 // Copyright (c) 2013 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/browser/chromeos/drive/search_metadata.h"
 
 #include <algorithm>
 #include <queue>
 
 #include "base/bind.h"
@@ skipping 148 matching lines @@
       entry.file_info().is_directory())
     return false;
 
   if (options & SEARCH_METADATA_SHARED_WITH_ME)
     return entry.shared_with_me();
 
   if (options & SEARCH_METADATA_OFFLINE) {
     if (entry.file_specific_info().is_hosted_document()) {
       // Not all hosted documents are cached by Drive offline app.
       // http://support.google.com/drive/bin/answer.py?hl=en&answer=1628467
-      std::string mime_type = drive::util::GetHostedDocumentMimeType(
-          entry.file_specific_info().document_extension());
+      std::string mime_type = entry.file_specific_info().content_mime_type();
       return mime_type == drive::util::kGoogleDocumentMimeType ||
              mime_type == drive::util::kGoogleSpreadsheetMimeType ||
              mime_type == drive::util::kGooglePresentationMimeType ||
              mime_type == drive::util::kGoogleDrawingMimeType;
     } else {
       return entry.file_specific_info().cache_state().is_present();
     }
   }
 
   return true;
@@ skipping 166 matching lines @@
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(pre)));
   highlighted_text->append("<b>");
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(match)));
   highlighted_text->append("</b>");
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(post)));
   return true;
 }
 
 }  // namespace internal
 }  // namespace drive