Make printing work better with OOPIF.

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 62d319a3ce809beff2aecafe3a45d1e5ceb336ae..118060d8529d34bba51cd4220d5c7555b9ebba48 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -51,6 +51,7 @@
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 #include "ui/gfx/ipc/skia/gfx_skia_param_traits.h"
+#include "ui/gfx/range/range.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
@@ -1289,6 +1290,14 @@ IPC_MESSAGE_ROUTED1(FrameHostMsg_VisibilityChanged, bool /* visible */)
 // user right clicked.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ContextMenu, content::ContextMenuParams)
 
+// Notification that the text selection has changed.
+// Note: The second parameter is the character based offset of the
+// base::string16 text in the document.
+IPC_MESSAGE_ROUTED3(FrameHostMsg_SelectionChanged,
+                    base::string16 /* text covers the selection range */,
+                    uint32_t /* the offset of the text in the document */,
+                    gfx::Range /* selection range in the document */)
+
 // Response for FrameMsg_JavaScriptExecuteRequest, sent when a reply was
 // requested. The ID is the parameter supplied to
 // FrameMsg_JavaScriptExecuteRequest. The result has the value returned by the