Use new API to download blobs from Google Drive.

chrome/browser/chromeos/extensions/file_manager/private_api_drive.cc

 // Copyright 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/extensions/file_manager/private_api_drive.h"
 
 #include <map>
 #include <set>
 #include <utility>
 
@@ skipping 79 matching lines @@
 
   if (!entry_proto.has_file_specific_info())
     return;
 
   const drive::FileSpecificInfo& file_specific_info =
       entry_proto.file_specific_info();
 
   if (!entry_proto.resource_id().empty()) {
     DriveApiUrlGenerator url_generator(
         (GURL(google_apis::DriveApiUrlGenerator::kBaseUrlForProduction)),
-        (GURL(
-            google_apis::DriveApiUrlGenerator::kBaseDownloadUrlForProduction)),
         (GURL(google_apis::DriveApiUrlGenerator::
                   kBaseThumbnailUrlForProduction)));
     properties->thumbnail_url.reset(new std::string(
         url_generator.GetThumbnailUrl(entry_proto.resource_id(),
                                       500 /* width */, 500 /* height */,
                                       false /* not cropped */).spec()));
     properties->cropped_thumbnail_url.reset(new std::string(
         url_generator.GetThumbnailUrl(
                           entry_proto.resource_id(),
                           kFileManagerMaximumThumbnailDimension /* width */,
@@ skipping 986 matching lines @@
 
   if (error != drive::FILE_ERROR_OK) {
     SetError("Download Url for this item is not available.");
     SetResult(new base::StringValue(""));  // Intentionally returns a blank.
     SendResponse(false);
     return;
   }
 
   DriveApiUrlGenerator url_generator(
       (GURL(google_apis::DriveApiUrlGenerator::kBaseUrlForProduction)),
-      (GURL(google_apis::DriveApiUrlGenerator::kBaseDownloadUrlForProduction)),
       (GURL(
           google_apis::DriveApiUrlGenerator::kBaseThumbnailUrlForProduction)));
   download_url_ = url_generator.GenerateDownloadFileUrl(entry->resource_id());
 
   ProfileOAuth2TokenService* oauth2_token_service =
       ProfileOAuth2TokenServiceFactory::GetForProfile(GetProfile());
   SigninManagerBase* signin_manager =
       SigninManagerFactory::GetForProfile(GetProfile());
   const std::string& account_id = signin_manager->GetAuthenticatedAccountId();
   std::vector<std::string> scopes;
@@ skipping 12 matching lines @@
     google_apis::DriveApiErrorCode code,
     const std::string& access_token) {
   if (code != google_apis::HTTP_SUCCESS) {
     SetError("Not able to fetch the token.");
     SetResult(new base::StringValue(""));  // Intentionally returns a blank.
     SendResponse(false);
     return;
   }
 
   const std::string url =
-      download_url_.Resolve("?access_token=" + access_token).spec();
+      download_url_.Resolve("?alt=media&access_token=" + access_token).spec();
   SetResult(new base::StringValue(url));
 
   SendResponse(true);
 }
 
 }  // namespace extensions