Implement sendKeys webdriver API in ChromeDriver.

chrome/test/webdriver/commands/webelement_command.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/test/webdriver/commands/webelement_command.h"
 
 #include "third_party/webdriver/atoms.h"
 #include "chrome/test/webdriver/error_codes.h"
 #include "chrome/test/webdriver/utility_functions.h"
 
 namespace webdriver {
 
 bool WebElementCommand::Init(Response* const response) {
-  if (WebDriverCommand::Init(response)) {
-    SET_WEBDRIVER_ERROR(response, "Failure on Init for web element command",
-                        kInternalServerError);
+  if (!WebDriverCommand::Init(response))
     return false;
-  }
 
   // There should be at least 5 segments to match
   // "/session/$session/element/$id"
   if (path_segments_.size() < 5) {
     SET_WEBDRIVER_ERROR(response, "Path segments is less than 5",
                         kBadRequest);
     return false;
   }
 
   // We cannot verify the ID is valid until we execute the command and
@@ skipping 47 matching lines @@
                << "{width:number, height:number} dictionary." << std::endl;
     return false;
   }
 
   DictionaryValue* dict = static_cast<DictionaryValue*>(result);
   return dict->GetInteger("width", width) &&
          dict->GetInteger("height", height);
 }
 
 }  // namespace webdriver