Use Drive v2 API: enable behind --enable-drive-api flag

chrome/browser/chromeos/gdata/gdata_operations.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/browser/chromeos/gdata/gdata_operations.h"
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/gdata/gdata_file_system.h"
 #include "chrome/browser/chromeos/gdata/gdata_util.h"
 #include "chrome/common/net/gaia/gaia_urls.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
 #include "chrome/common/net/url_util.h"
 #include "net/base/escape.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 #include "third_party/libxml/chromium/libxml_utils.h"
 
@@ skipping 37 matching lines @@
     "https://docs.google.com/feeds/default/private/full";
 
 // URL requesting single document entry whose resource id is specified by "%s".
 const char kGetDocumentEntryURLFormat[] =
     "https://docs.google.com/feeds/default/private/full/%s";
 
 // Metadata feed with things like user quota.
 const char kAccountMetadataURL[] =
     "https://docs.google.com/feeds/metadata/default";
 
+const char kDriveV2AboutURL[] =
+    "https://www.googleapis.com/drive/v2/about";
+
 const char kUploadContentRange[] = "Content-Range: bytes ";
 const char kUploadContentType[] = "X-Upload-Content-Type: ";
 const char kUploadContentLength[] = "X-Upload-Content-Length: ";
 
 #ifndef NDEBUG
 // Use smaller 'page' size while debugging to ensure we hit feed reload
 // almost always. Be careful not to use something too small on account that
 // have many items because server side 503 error might kick in.
 const int kMaxDocumentsPerFeed = 1000;
 #else
 const int kMaxDocumentsPerFeed = 1000;
 #endif
 
 // Maximum number of attempts for re-authentication per operation.
 const int kMaxReAuthenticateAttemptsPerOperation = 1;
 
 const char kFeedField[] = "feed";
 
 // Templates for file uploading.
 const char kUploadParamConvertKey[] = "convert";
 const char kUploadParamConvertValue[] = "false";
 const char kUploadResponseLocation[] = "location";
 const char kUploadResponseRange[] = "range";
 
 // OAuth scope for the documents API.
 const char kDocsListScope[] = "https://docs.google.com/feeds/";
 const char kSpreadsheetsScope[] = "https://spreadsheets.google.com/feeds/";
 const char kUserContentScope[] = "https://docs.googleusercontent.com/";
 
+// OAuth scope for Google Drive v2 API
+// See https://developers.google.com/drive/scopes.
+// Tokens with scope https://docs.google.com/feeds are accepted and treated
+// the same as tokens with scope https://www.googleapis.com/auth/drive and
+// this is not necessary for the migration period.
+const char kDriveScope[] = "https://www.googleapis.com/auth/drive";
+
 // Adds additional parameters for API version, output content type and to show
 // folders in the feed are added to document feed URLs.
 GURL AddStandardUrlParams(const GURL& url) {
   GURL result =
       chrome_common_net::AppendOrReplaceQueryParameter(url, "v", "3");
   result =
       chrome_common_net::AppendOrReplaceQueryParameter(result, "alt", "json");
   return result;
 }
 
@@ skipping 450 matching lines @@
   GURL result = GURL(base::StringPrintf(kGetDocumentEntryURLFormat,
                                         net::EscapePath(resource_id_).c_str()));
   return AddStandardUrlParams(result);
 }
 
 //========================= GetAccountMetadataOperation ========================
 
 GetAccountMetadataOperation::GetAccountMetadataOperation(
     GDataOperationRegistry* registry,
     Profile* profile,
-    const GetDataCallback& callback)
-    : GetDataOperation(registry, profile, callback) {
+    const GetDataCallback& callback,
+    bool use_drive_api)
+    : GetDataOperation(registry, profile, callback),
+      use_drive_api_(use_drive_api) {
 }
 
 GetAccountMetadataOperation::~GetAccountMetadataOperation() {}
 
 GURL GetAccountMetadataOperation::GetURL() const {
-  return AddMetadataUrlParams(GURL(kAccountMetadataURL));
+  return use_drive_api_ ?
+      GURL(kDriveV2AboutURL) : AddMetadataUrlParams(GURL(kAccountMetadataURL));
 }
 
 //============================ DownloadFileOperation ===========================
 
 DownloadFileOperation::DownloadFileOperation(
     GDataOperationRegistry* registry,
     Profile* profile,
     const DownloadActionCallback& download_action_callback,
     const GetDownloadDataCallback& get_download_data_callback,
     const GURL& document_url,
@@ skipping 638 matching lines @@
   return true;
 }
 
 void ResumeUploadOperation::OnURLFetchUploadProgress(
     const net::URLFetcher* source, int64 current, int64 total) {
   // Adjust the progress values according to the range currently uploaded.
   NotifyProgress(params_.start_range + current, params_.content_length);
 }
 
 }  // namespace gdata