[Local NTP] Add an integration test for the fakebox

chrome/browser/ui/search/instant_test_utils.cc

 // Copyright 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.
 
 #include "chrome/browser/ui/search/instant_test_utils.h"
 
 #include <stddef.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 100 matching lines @@
       contents, WrapScript(script), result);
 }
 
 bool InstantTestBase::GetIntFromJS(content::WebContents* contents,
                                    const std::string& script,
                                    int* result) {
   return content::ExecuteScriptAndExtractInt(
       contents, WrapScript(script), result);
 }
 
+bool InstantTestBase::GetDoubleFromJS(content::WebContents* contents,
+                                      const std::string& script,
+                                      double* result) {
+  return content::ExecuteScriptAndExtractDouble(contents, WrapScript(script),
+                                                result);
+}
+
 bool InstantTestBase::GetStringFromJS(content::WebContents* contents,
                                       const std::string& script,
                                       std::string* result) {
   return content::ExecuteScriptAndExtractString(
       contents, WrapScript(script), result);
 }
 
 std::string InstantTestBase::GetOmniboxText() {
   return base::UTF16ToUTF8(omnibox()->GetText());
 }
 
 bool InstantTestBase::LoadImage(content::RenderViewHost* rvh,
                                 const std::string& image,
                                 bool* loaded) {
   std::string js_chrome =
       "var img = document.createElement('img');"
       "img.onerror = function() { domAutomationController.send(false); };"
       "img.onload  = function() { domAutomationController.send(true); };"
       "img.src = '" + image + "';";
   return content::ExecuteScriptAndExtractBool(rvh, js_chrome, loaded);
 }