Change the ChromiumPasteboard to have a notion of an alternate clipboard...

chrome/browser/autocomplete/autocomplete_edit_view_mac.mm

Index: chrome/browser/autocomplete/autocomplete_edit_view_mac.mm
===================================================================
--- chrome/browser/autocomplete/autocomplete_edit_view_mac.mm	(revision 25640)
+++ chrome/browser/autocomplete/autocomplete_edit_view_mac.mm	(working copy)
@@ -661,9 +661,10 @@
   // will too.
   DCHECK(clipboard);
 
-  if (clipboard->IsFormatAvailable(Clipboard::GetPlainTextWFormatType())) {
+  if (clipboard->IsFormatAvailable(Clipboard::GetPlainTextWFormatType(),
+                                   Clipboard::BUFFER_STANDARD)) {
     string16 text16;
-    clipboard->ReadText(&text16);
+    clipboard->ReadText(Clipboard::BUFFER_STANDARD, &text16);
 
     // Note: Unlike in the find popup and textfield view, here we completely
     // remove whitespace strings containing newlines.  We assume users are
@@ -681,7 +682,8 @@
   // and pastes from the URL bar to itself, the text will get fixed up and
   // cannonicalized, which is not what the user expects.  By pasting in this
   // order, we are sure to paste what the user copied.
-  if (clipboard->IsFormatAvailable(Clipboard::GetUrlWFormatType())) {
+  if (clipboard->IsFormatAvailable(Clipboard::GetUrlWFormatType(),
+                                   Clipboard::BUFFER_STANDARD)) {
     std::string url_str;
     clipboard->ReadBookmark(NULL, &url_str);
     // pass resulting url string through GURL to normalize