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

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
diff --git a/chrome/browser/extensions/extension_host.cc b/chrome/browser/extensions/extension_host.cc
index 74ca03287af1b8b67085dbe5156025f093dc2bc3..707462a6952d94f5b2eb8e5c2d006bf86bcde2c9 100644
--- a/chrome/browser/extensions/extension_host.cc
+++ b/chrome/browser/extensions/extension_host.cc
@@ -515,12 +515,6 @@ WebPreferences ExtensionHost::GetWebkitPrefs() {
     webkit_prefs.accelerated_2d_canvas_enabled = false;
   }
 
-  // TODO(dcheng): incorporate this setting into kClipboardPermission check.
-  webkit_prefs.javascript_can_access_clipboard = true;
-
-  // TODO(dcheng): check kClipboardPermission instead once it's implemented.
-  if (extension_->HasApiPermission(Extension::kExperimentalPermission))
-    webkit_prefs.dom_paste_enabled = true;
   return webkit_prefs;
 }
 
@@ -670,6 +664,16 @@ void ExtensionHost::ShowPopupMenu(const gfx::Rect& bounds,
 #endif
 }
 
+bool ExtensionHost::IsWebCopyCutEnabled() {
+  // For backwards compatibility, extensions can always copy/cut items into the
+  // clipboard.
+  return true;
+}
+
+bool ExtensionHost::IsWebPasteEnabled() {
+  return extension_->HasApiPermission(Extension::kClipboardPermission);
+}
+
 void ExtensionHost::StartDragging(const WebDropData& drop_data,
     WebDragOperationsMask operation_mask,
     const SkBitmap& image,