Small test and ChromeDriver fixes to enable additional tests.

chrome/test/webdriver/webdriver_key_converter.h

Index: chrome/test/webdriver/webdriver_key_converter.h
diff --git a/chrome/test/webdriver/webdriver_key_converter.h b/chrome/test/webdriver/webdriver_key_converter.h
index e0fad8721f45b3e9eb3de37aeb53c5825893b7c8..1567cdd5cd8e676e11792cc3c7ee16fd4a9728dc 100644
--- a/chrome/test/webdriver/webdriver_key_converter.h
+++ b/chrome/test/webdriver/webdriver_key_converter.h
@@ -22,9 +22,12 @@ WebKeyEvent CreateCharEvent(const std::string& unmodified_text,
                             const std::string& modified_text,
                             int modifiers);
 
-// Converts keys into appropriate |WebKeyEvent|s.
-void ConvertKeysToWebKeyEvents(const string16& keys,
-                               std::vector<WebKeyEvent>* key_events);
+// Converts keys into appropriate |WebKeyEvent|s. This will do a best effort
+// conversion. However, if the input is invalid it will return false and set
+// an error message.
+bool ConvertKeysToWebKeyEvents(const string16& keys,
+                               std::vector<WebKeyEvent>* key_events,
+                               std::string* error_msg);
 
 }  // namespace webdriver