Improvements to unit test behavior.

- Standardize the test timeout implementation using a new TestHandler::SetTestTimeout method and enable timeouts for almost all tests. The test timeout can be disabled globally using a new `--disable-test-timeout` command-line flag.
- Wait for TestHandler object destruction at the end of each test using a new ReleaseAndWaitForDestructor function. This avoids test state leakage and verifies that no object references are leaked.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1964 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/unittests/request_handler_unittest.cc

@@ -123,6 +123,9 @@ class NetNotifyTestHandler : public TestHandler {
     // Navigate to the 2nd URL.
     context_handler_->SetURL(url2_);
     GetBrowser()->GetMainFrame()->LoadURL(url2_);
+
+    // Time out the test after a reasonable period of time.
+    SetTestTimeout();
   }
 
   bool OnBeforeResourceLoad(CefRefPtr<CefBrowser> browser,
@@ -448,6 +451,10 @@ void RunNetNotifyTest(NetNotifyTestType test_type, bool same_origin) {
 
   collection.ExecuteTests();
 
+  ReleaseAndWaitForDestructor(handler1);
+  ReleaseAndWaitForDestructor(handler2);
+  ReleaseAndWaitForDestructor(handler3);
+
   g_net_notify_test = false;
 }