Reland "Add ExecuteJavaScriptForTest and make all tests use it"

content/public/test/test_utils.cc

Index: content/public/test/test_utils.cc
diff --git a/content/public/test/test_utils.cc b/content/public/test/test_utils.cc
index 4293f399d97612ea632965f0f2df7cebb3fee947..8158eeeef239e1caf8b874c6bf4f0e262e7a0990 100644
--- a/content/public/test/test_utils.cc
+++ b/content/public/test/test_utils.cc
@@ -175,7 +175,7 @@ scoped_ptr<base::Value> ExecuteScriptAndGetValue(
     RenderFrameHost* render_frame_host, const std::string& script) {
   ScriptCallback observer;
 
-  render_frame_host->ExecuteJavaScript(
+  render_frame_host->ExecuteJavaScriptForTests(
       base::UTF8ToUTF16(script),
       base::Bind(&ScriptCallback::ResultCallback, base::Unretained(&observer)));
   base::MessageLoop* loop = base::MessageLoop::current();