Use a distinct source parameter on gaia endpoints for the reconcilor.

google_apis/gaia/merge_session_helper_unittest.cc

 // Copyright 2014 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 <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 32 matching lines @@
 // We can EXPECT_* to be zero at the end of our unit tests
 // to make sure everything is properly deleted.
 
 int total = 0;
 
 class InstrumentedMergeSessionHelper : public MergeSessionHelper {
  public:
   InstrumentedMergeSessionHelper(
       OAuth2TokenService* token_service,
       net::URLRequestContextGetter* request_context) :
-    MergeSessionHelper(token_service, request_context, NULL) {
+    MergeSessionHelper(token_service, GaiaConstants::kChromeSource,
+                       request_context, NULL) {
     total++;
   }
 
   virtual ~InstrumentedMergeSessionHelper() {
     total--;
   }
 
   MOCK_METHOD0(StartFetching, void());
   MOCK_METHOD0(StartLogOutUrlFetch, void());
 
@@ skipping 337 matching lines @@
   MergeSessionHelper::ExternalCcResultFetcher::URLToTokenAndFetcher fetchers =
       result_fetcher.get_fetcher_map_for_testing();
   ASSERT_EQ(1u, fetchers.size());
   ASSERT_EQ(1u, fetchers.count(GURL("http://www.yt.com")));
 
   // Simulate response for "yt" with a string that is too long.
   SimulateGetCheckConnctionInfoResult(
       fetchers[GURL("http://www.yt.com")].second, "1234567890123456trunc");
   ASSERT_EQ("yt:1234567890123456", result_fetcher.GetExternalCcResult());
 }