Add pyauto tests and helper files for system-level testing of Web SQL Databases.

chrome/test/pyautolib/pyautolib.h

Index: chrome/test/pyautolib/pyautolib.h
diff --git a/chrome/test/pyautolib/pyautolib.h b/chrome/test/pyautolib/pyautolib.h
index c40b97e365f1bffab3e52b87c6e615550e0862fb..00f1c28938e6ba4eb852092c4b4a8dac104f33e6 100644
--- a/chrome/test/pyautolib/pyautolib.h
+++ b/chrome/test/pyautolib/pyautolib.h
@@ -58,6 +58,10 @@ class PyUITestBase : public UITestBase {
   // Blocks until page loaded.
   void NavigateToURL(const char* url_string, int window_index, int tab_index);
 
+  // Reloads the active tab in the given window.
+  // Blocks until page reloaded.
+  void ReloadActiveTab(int window_index = 0);
+
   // Get the URL of the active tab.
   GURL GetActiveTabURL(int window_index = 0);