Reland r56483 - Monitor network change in GoogleURLTracker

chrome/common/net/test_url_fetcher_factory.h

Index: chrome/common/net/test_url_fetcher_factory.h
diff --git a/chrome/common/net/test_url_fetcher_factory.h b/chrome/common/net/test_url_fetcher_factory.h
index 3d8646677eb68140a94d4411f012dd6aed542df2..e48c0e0c52df5f52002cb783e94989ea8f2ad6fe 100644
--- a/chrome/common/net/test_url_fetcher_factory.h
+++ b/chrome/common/net/test_url_fetcher_factory.h
@@ -53,6 +53,13 @@ class TestURLFetcher : public URLFetcher {
   // Returns the data uploaded on this URLFetcher.
   const std::string& upload_data() const { return URLFetcher::upload_data(); }
 
+  // Overriden to do nothing. URLFetcher implementation add reference
+  // to request_context_getter in core_, but it might not be released
+  // because we wouldn't call Core::CancelURLRequest.
+  // Without this, we'll see leaks of URLRequestContext in test.
+  virtual void set_requeset_context(
+      URLRequestContextGetter* request_context_getter) {}
+
  private:
   const GURL original_url_;