Hide location bar on Javascript-initiated scroll.

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 9a3201509725e99baa7318f3da63cc22de93cf9a..81a35c1623cc02c5fde692db5b42a691d180e576 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -1366,6 +1366,9 @@ IPC_MESSAGE_ROUTED3(ViewMsg_UpdateTopControlsState,
                     bool /* enable_showing */,
                     bool /* animate */)
 
+// Tells the renderer to show or hide the top controls.
+IPC_MESSAGE_ROUTED1(ViewMsg_ShowTopControls, bool /* show */)
+
 IPC_MESSAGE_ROUTED0(ViewMsg_ShowImeIfNeeded)
 
 #elif defined(OS_MACOSX)
@@ -1508,6 +1511,11 @@ IPC_MESSAGE_ROUTED0(ViewHostMsg_UpdateScreenRects_ACK)
 IPC_MESSAGE_ROUTED1(ViewHostMsg_RequestMove,
                     gfx::Rect /* position */)
 
+// Sent by the renderer process to notify the browser that the web page has
+// programmatically scrolled.
+IPC_MESSAGE_ROUTED1(ViewHostMsg_DidProgrammaticallyScroll,
+                    gfx::Point /* scroll point */)
+
 // Notifies the browser that a frame in the view has changed. This message
 // has a lot of parameters and is packed/unpacked by functions defined in
 // render_messages.h.