Adds testing infrastructure to web_ui_browsertest to support testing HtmlDialogs.

chrome/browser/ui/webui/web_ui_browsertest.h

Index: chrome/browser/ui/webui/web_ui_browsertest.h
diff --git a/chrome/browser/ui/webui/web_ui_browsertest.h b/chrome/browser/ui/webui/web_ui_browsertest.h
index 50876783ec58f35f14291ee6a767b5da6e292ee6..e1c04d11da2967877e53863353ea002be20c1bde 100644
--- a/chrome/browser/ui/webui/web_ui_browsertest.h
+++ b/chrome/browser/ui/webui/web_ui_browsertest.h
@@ -76,7 +76,7 @@ class WebUIBrowserTest
                          const ConstValueVector& test_arguments);
 
   // Runs a test that may include calls to functions in test_api.js, and waits
-  // for call to asyncTestDone().  Takes ownership of Value arguments.
+  // for call to testDone().  Takes ownership of Value arguments.
   bool RunJavascriptAsyncTest(const std::string& test_name);
   bool RunJavascriptAsyncTest(const std::string& test_name,
                               base::Value* arg);
@@ -125,6 +125,9 @@ class WebUIBrowserTest
   // Tear down override for |kDummyURL|.
   virtual void TearDownInProcessBrowserTestFixture() OVERRIDE;
 
+  // Set a WebUI instance to run tests on.
+  void SetWebUIInstance(WebUI* web_ui);
+
   // Returns a mock WebUI object under test (if any).
   virtual WebUIMessageHandler* GetMockMessageHandler();
 
@@ -178,6 +181,10 @@ class WebUIBrowserTest
   // PreloadJavascriptLibraries().
   std::string preload_test_fixture_;
   std::string preload_test_name_;
+
+  // When this is non-NULL, this is The WebUI instance used for testing.
+  // Otherwise the selected tab's web_ui is used.
+  WebUI* override_selected_web_ui_;
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_WEB_UI_BROWSERTEST_H_