PyAuto: Automation hooks to get/set theme

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 d293370dd7744595986a4b145e8208c33543c69e..6c6fc3590f6b3288fd5e29a219740e1639a0b459 100644
--- a/chrome/test/pyautolib/pyautolib.h
+++ b/chrome/test/pyautolib/pyautolib.h
@@ -147,6 +147,9 @@ class PyUITestBase : public UITestBase {
   // automation proxy additions.  Returns response as JSON dict.
   std::string _SendJSONRequest(int window_index, std::string& request);
 
+  // Resets to the default theme. Returns true on success.
+  bool ResetToDefaultTheme();
+
  private:
   // Enables PostTask to main thread.
   // Should be shared across multiple instances of PyUITestBase so that this