Small test and ChromeDriver fixes to enable additional tests.

chrome/test/webdriver/commands/webelement_commands.cc

Index: chrome/test/webdriver/commands/webelement_commands.cc
diff --git a/chrome/test/webdriver/commands/webelement_commands.cc b/chrome/test/webdriver/commands/webelement_commands.cc
index 9471e4be47cd0b93362798336d8fc23de01d587e..b956a4e7493d4bb5b4286981ae0b2f72c84fc418 100644
--- a/chrome/test/webdriver/commands/webelement_commands.cc
+++ b/chrome/test/webdriver/commands/webelement_commands.cc
@@ -155,16 +155,12 @@ bool ElementDisplayedCommand::DoesGet() {
 }
 
 void ElementDisplayedCommand::ExecuteGet(Response* const response) {
-  scoped_ptr<ListValue> args(new ListValue);
-  args->Append(element.ToValue());
-
-  std::string script = base::StringPrintf(
-      "return (%s).apply(null, arguments);", atoms::IS_DISPLAYED);
-
-  Value* result = NULL;
-  ErrorCode status = session_->ExecuteScript(script, args.get(), &result);
+  bool is_displayed;
+  ErrorCode status = session_->IsElementDisplayed(
+      session_->current_target(), element, &is_displayed);
+  if (status == kSuccess)
+    response->SetValue(Value::CreateBooleanValue(is_displayed));
   response->SetStatus(status);
-  response->SetValue(result);
 }
 
 ///////////////////// ElementEnabledCommand ////////////////////