Enable isolated worlds for content scripts....

webkit/glue/webframe_impl.cc

Index: webkit/glue/webframe_impl.cc
===================================================================
--- webkit/glue/webframe_impl.cc	(revision 20764)
+++ webkit/glue/webframe_impl.cc	(working copy)
@@ -1604,12 +1604,23 @@
         sources_in[i].startLine));
   }
 
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kIsolatedWorld))
-    frame_->script()->evaluateInNewWorld(sources);
-  else
-    frame_->script()->evaluateInNewContext(sources);
+  frame_->script()->evaluateInNewContext(sources);
 }
 
+void WebFrameImpl::ExecuteScriptInNewWorld(
+    const WebScriptSource* sources_in, int num_sources) {
+  Vector<WebCore::ScriptSourceCode> sources;
+
+  for (int i = 0; i < num_sources; ++i) {
+    sources.append(WebCore::ScriptSourceCode(
+        webkit_glue::WebStringToString(sources_in[i].code),
+        webkit_glue::WebURLToKURL(sources_in[i].url),
+        sources_in[i].startLine));
+  }
+
+  frame_->script()->evaluateInNewWorld(sources);
+}
+
 std::wstring WebFrameImpl::GetName() {
   return webkit_glue::StringToStdWString(frame_->tree()->name());
 }