Chrome changes to extract the code from V8Proxy that special-cases...

chrome/renderer/render_view.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/render_view.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 2404 matching lines @@
   Send(new ViewHostMsg_DidDisplayInsecureContent(routing_id_));
 }
 
 void RenderView::didRunInsecureContent(
     WebFrame* frame, const WebSecurityOrigin& origin) {
   Send(new ViewHostMsg_DidRunInsecureContent(
       routing_id_,
       origin.toString().utf8()));
 }
 
+bool RenderView::allowScript(WebFrame* frame, bool enabled_per_settings) {
+  if (enabled_per_settings)
+    return true;
+
+  WebSecurityOrigin origin = frame->securityOrigin();
+  if (origin.isEmpty())
+    return false;  // Uninitialized document?
+
+  if (EqualsASCII(origin.protocol(), chrome::kChromeUIScheme))
+    return true;  // Browser UI elements should still work.
+
+  // If the scheme is ftp: or file:, an empty file name indicates a directory
+  // listing, which requires JavaScript to function properly.
+  GURL frame_url = frame->url();
+  const char* kDirProtocols[] = { "ftp", "file" };
+  for (size_t i = 0; i < arraysize(kDirProtocols); ++i) {
+    if (EqualsASCII(origin.protocol(), kDirProtocols[i])) {
+      return frame_url.SchemeIs(kDirProtocols[i]) &&
+             frame_url.ExtractFileName().empty();
+    }
+  }
+
+  return false;  // Other protocols fall through here.
+}
+
 void RenderView::didExhaustMemoryAvailableForScript(WebFrame* frame) {
   Send(new ViewHostMsg_JSOutOfMemory(routing_id_));
 }
 
 void RenderView::didCreateScriptContext(WebFrame* frame) {
   EventBindings::HandleContextCreated(frame, false);
 }
 
 void RenderView::didDestroyScriptContext(WebFrame* frame) {
   EventBindings::HandleContextDestroyed(frame);
@@ skipping 1279 matching lines @@
       new PluginMsg_SignalModalDialogEvent(host_window_));
 
   message->EnableMessagePumping();  // Runs a nested message loop.
   bool rv = Send(message);
 
   PluginChannelHost::Broadcast(
       new PluginMsg_ResetModalDialogEvent(host_window_));
 
   return rv;
 }