Implement upload progress reporting in FakeDriveSerivice.

chrome/browser/google_apis/fake_drive_service.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/google_apis/fake_drive_service.h"
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 898 matching lines @@
         base::Bind(callback,
                    UploadRangeResponse(HTTP_NOT_FOUND,
                                        start_position,
                                        end_position),
                    base::Passed(&result_entry)));
     return;
   }
 
   entry->SetString("docs$size.$t", base::Int64ToString(end_position));
 
+  if (!progress_callback.is_null()) {
+    // In the real GDataWapi/Drive DriveService, progress is reported in
+    // nondeterministic timing. In this fake implementation, we choose to call
+    // it twice per one ResumeUpload. This is for making sure that client code
+    // works fine even if the callback is invoked more than once; it is the
+    // crucial difference of the progress callback from others.
+    int64 mid_position = start_position + (end_position - start_position) / 2;
+    MessageLoop::current()->PostTask(
+        FROM_HERE, base::Bind(progress_callback, mid_position));
+    MessageLoop::current()->PostTask(
+        FROM_HERE, base::Bind(progress_callback, end_position));
+  }
+
   if (content_length != end_position) {
     MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(callback,
                    UploadRangeResponse(HTTP_RESUME_INCOMPLETE,
                                        start_position,
                                        end_position),
                     base::Passed(&result_entry)));
     return;
   }
@@ skipping 379 matching lines @@
 
   ++resource_list_load_count_;
   MessageLoop::current()->PostTask(
       FROM_HERE,
       base::Bind(callback,
                  HTTP_SUCCESS,
                  base::Passed(&resource_list)));
 }
 
 }  // namespace google_apis