[Local NTP] Add an integration test for the fakebox

chrome/browser/ui/search/instant_test_utils.cc

Index: chrome/browser/ui/search/instant_test_utils.cc
diff --git a/chrome/browser/ui/search/instant_test_utils.cc b/chrome/browser/ui/search/instant_test_utils.cc
index 7f04880c48a8d659070323d3dc7358014b24dec1..6ab4a5fd1d82d3c9e6fed2d630d4085970894855 100644
--- a/chrome/browser/ui/search/instant_test_utils.cc
+++ b/chrome/browser/ui/search/instant_test_utils.cc
@@ -118,6 +118,13 @@ bool InstantTestBase::GetIntFromJS(content::WebContents* contents,
       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) {