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

chrome/browser/download/download_browsertest.cc

Index: chrome/browser/download/download_browsertest.cc
diff --git a/chrome/browser/download/download_browsertest.cc b/chrome/browser/download/download_browsertest.cc
index 22eebc08b807c81b1f57d0d0e593496a871c0e9e..5333bac1f5396c4598f230b697a5b401a5ea3e61 100644
--- a/chrome/browser/download/download_browsertest.cc
+++ b/chrome/browser/download/download_browsertest.cc
@@ -998,8 +998,8 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, DownloadResourceThrottleCancels) {
   bool download_assempted;
   ASSERT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       chrome::GetActiveWebContents(browser())->GetRenderViewHost(),
-      L"",
-      L"window.domAutomationController.send(startDownload());",
+      "",
+      "window.domAutomationController.send(startDownload());",
       &download_assempted));
   ASSERT_TRUE(download_assempted);
   observer.WaitForObservation(
@@ -1427,8 +1427,8 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, ChromeURLAfterDownload) {
   bool webui_responded = false;
   EXPECT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       contents->GetRenderViewHost(),
-      L"",
-      L"window.domAutomationController.send(window.webui_responded_);",
+      "",
+      "window.domAutomationController.send(window.webui_responded_);",
       &webui_responded));
   EXPECT_TRUE(webui_responded);
 }
@@ -1447,9 +1447,9 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, BrowserCloseAfterDownload) {
   bool result = false;
   EXPECT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       contents->GetRenderViewHost(),
-      L"",
-      L"window.onunload = function() { var do_nothing = 0; }; "
-      L"window.domAutomationController.send(true);",
+      "",
+      "window.onunload = function() { var do_nothing = 0; }; "
+      "window.domAutomationController.send(true);",
       &result));
   EXPECT_TRUE(result);