Adds paste function to searchbox api and handles paste event on fakebox

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 547057cf0a9503a7003d7f69afefcca74e293915..e75e566fa3828e37719608e2bb1efb1433d5e6d9 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -672,6 +672,13 @@ IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_FocusOmnibox,
                     int /* page_id */,
                     OmniboxFocusState /* state */)
 
+// Tells InstantExtended to paste text into the omnibox.  If text is empty,
+// the clipboard contents will be pasted. This causes the omnibox dropdown to
+// open.
+IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_PasteAndOpenDropdown,
+                    int /* page_id */,
+                    string16 /* text to be pasted */)
+
 // Tells InstantExtended whether the embedded search API is supported.
 // See http://dev.chromium.org/embeddedsearch
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_InstantSupportDetermined,