Add IPCs to check web copy/cut/paste for extensions with the appropriate permission bit.

chrome/browser/renderer_host/render_message_filter.cc

Index: chrome/browser/renderer_host/render_message_filter.cc
diff --git a/chrome/browser/renderer_host/render_message_filter.cc b/chrome/browser/renderer_host/render_message_filter.cc
index 4ae24e0a570043dc04062e88fcefc497a2d50739..3864bb49145d0544e5e803338771dcf30dade6c3 100644
--- a/chrome/browser/renderer_host/render_message_filter.cc
+++ b/chrome/browser/renderer_host/render_message_filter.cc
@@ -847,6 +847,21 @@ void RenderMessageFilter::OnDownloadUrl(const IPC::Message& message,
                                            context);
 }
 
+void RenderMessageFilter::OnIsWebCopyCutEnabled(const GURL& url,
+                                                bool* enabled) {
+  // TODO(dcheng): is this right? Will it be NULL if it's not an extension?

[Aaron Boodman, 2011/02/22 21:49:01]

No, this is not correct, unfortunately. Extensions can affect other URLs via
their 'extent' feature.

Looks like you need to add a method to ExtensionInfoMap like
GetExtensionInfoForURL() or URLHasExtensionInfo(). Take a look at the
implementation of CheckURLAccessToPermission() to see what I mean.

+  ChromeURLRequestContext* context = GetRequestContextForURL(url);
+  *enabled = context->extension_info_map() != NULL;
+}
+
+void RenderMessageFilter::OnIsWebPasteEnabled(const GURL& url,
+                                              bool* enabled) {
+  ChromeURLRequestContext* context = GetRequestContextForURL(url);
+  *enabled = context->extension_info_map() != NULL &&
+      context->extension_info_map()->CheckURLAccessToExtensionPermission(
+          url, Extension::kClipboardPermission);
+}
+
 void RenderMessageFilter::OnClipboardWriteObjectsSync(
     const ui::Clipboard::ObjectMap& objects,
     base::SharedMemoryHandle bitmap_handle) {