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/display_unittest.cc

@@ -45,6 +45,9 @@ class TitleTestHandler : public TestHandler {
 
     // Create the browser.
     CreateBrowser(kTitleUrl1);
+
+    // Time out the test after a reasonable period of time.
+    SetTestTimeout();
   }
 
   void OnTitleChange(CefRefPtr<CefBrowser> browser,
@@ -109,4 +112,5 @@ class TitleTestHandler : public TestHandler {
 TEST(DisplayTest, Title) {
   CefRefPtr<TitleTestHandler> handler = new TitleTestHandler();
   handler->ExecuteTest();
+  ReleaseAndWaitForDestructor(handler);
 }