Add support for JavaScript alert, confirm, prompt and onbeforeunload dialogs (issue #507).

- Add CefJSDialogHandler and CefJSDialogCallback interfaces.
- Add default dialog implementations for Windows and Mac OS-X.
- Add "JavaScript Dialogs" example to cefclient.
- Change TestHandler::AddResource to ignore the query component when matching URLs.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@594 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/cefclient/resource_util_win.cpp

@@ -35,6 +35,7 @@ CefRefPtr<CefStreamReader> GetBinaryResourceReader(int binaryId) {
         new CefByteReadHandler(pBytes, dwSize, NULL));
   }
 
+  ASSERT(FALSE);  // The resource should be found.
   return NULL;
 }
 
@@ -45,6 +46,7 @@ CefRefPtr<CefStreamReader> GetBinaryResourceReader(const char* resource_name) {
     int id;
   } resource_map[] = {
     {"binding.html", IDS_BINDING},
+    {"dialogs.html", IDS_DIALOGS},
     {"localstorage.html", IDS_LOCALSTORAGE},
     {"xmlhttprequest.html", IDS_XMLHTTPREQUEST},
   };