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

chrome/test/base/tracing_browsertest.cc

Index: chrome/test/base/tracing_browsertest.cc
diff --git a/chrome/test/base/tracing_browsertest.cc b/chrome/test/base/tracing_browsertest.cc
index ad76e504dd7e1e69747485060e05978e209432fc..2df0d842d8498cd0890b409f1de0e962d7f58763 100644
--- a/chrome/test/base/tracing_browsertest.cc
+++ b/chrome/test/base/tracing_browsertest.cc
@@ -32,7 +32,7 @@ class TracingBrowserTest : public InProcessBrowserTest {
     content::RenderViewHost* rvh =
         chrome::GetActiveWebContents(browser())->GetRenderViewHost();
     ASSERT_TRUE(rvh);
-    ASSERT_TRUE(content::ExecuteJavaScript(rvh, L"", L";"));
+    ASSERT_TRUE(content::ExecuteJavaScript(rvh, "", ";"));
   }
 };