Change ExecuteJavaScript* helper functions in browser_test_utils.{h,cc}

content/browser/bookmarklet_browsertest.cc

Index: content/browser/bookmarklet_browsertest.cc
diff --git a/content/browser/bookmarklet_browsertest.cc b/content/browser/bookmarklet_browsertest.cc
index 761c642260fe299617763563d461b0d662aa2631..81eda4130024dab5998bf2b88e8834665cb06a6d 100644
--- a/content/browser/bookmarklet_browsertest.cc
+++ b/content/browser/bookmarklet_browsertest.cc
@@ -24,8 +24,8 @@ class BookmarkletTest : public ContentBrowserTest {
     std::string body_text;
     EXPECT_TRUE(ExecuteJavaScriptAndExtractString(
         shell()->web_contents()->GetRenderViewHost(),
-        L"",
-        L"window.domAutomationController.send(document.body.innerText);",
+        "",
+        "window.domAutomationController.send(document.body.innerText);",
         &body_text));
     return body_text;
   }