Implement the WebSmartPaste pasteboard type on Mac, stub it out on Linux, rem...

base/clipboard_linux.cc

Index: base/clipboard_linux.cc
===================================================================
--- base/clipboard_linux.cc	(revision 5474)
+++ base/clipboard_linux.cc	(working copy)
@@ -140,6 +140,12 @@
   InsertMapping(kMimeHtml, data, markup_len);
 }
 
+// Write an extra flavor that signifies WebKit was the last to modify the
+// pasteboard. This flavor has no data.
+void Clipboard::WriteWebSmartPaste() {
+  NOTIMPLEMENTED();
+}
+
 // We do not use gtk_clipboard_wait_is_target_available because of
 // a bug with the gtk clipboard. It caches the available targets
 // and does not always refresh the cache when it is appropriate.
@@ -227,6 +233,12 @@
   return gdk_atom_intern(kMimeHtml, false);
 }
 
+// static
+Clipboard::FormatType Clipboard::GetWebKitSmartPasteFormatType() {
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
 // Insert the key/value pair in the clipboard_data structure. If
 // the mapping already exists, it frees the associated data. Don't worry
 // about double freeing because if the same key is inserted into the