[chromedriver] Fix bug in command for GetElementValueOfCSSProperty.

chrome/test/chromedriver/element_util.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_TEST_CHROMEDRIVER_ELEMENT_UTIL_H_
 #define CHROME_TEST_CHROMEDRIVER_ELEMENT_UTIL_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 35 matching lines @@
     const std::string& attribute_name,
     const std::string& attribute_value,
     bool* is_equal);
 
 Status GetElementClickableLocation(
     Session* session,
     WebView* web_view,
     const std::string& element_id,
     WebPoint* location);
 
+Status GetElementEffectiveStyle(
+    Session* session,
+    WebView* web_view,
+    const std::string& element_id,
+    const std::string& property_name,
+    std::string* property_value);
+
 Status GetElementRegion(
     Session* session,
     WebView* web_view,
     const std::string& element_id,
     WebRect* rect);
 
 Status GetElementTagName(
     Session* session,
     WebView* web_view,
     const std::string& element_id,
@@ skipping 50 matching lines @@
 Status ScrollElementRegionIntoView(
     Session* session,
     WebView* web_view,
     const std::string& element_id,
     const WebRect& region,
     bool center,
     bool verify_clickable,
     WebPoint* location);
 
 #endif  // CHROME_TEST_CHROMEDRIVER_ELEMENT_UTIL_H_