Make printing work better with OOPIF. (try 2)

chrome/browser/printing/print_view_manager_common.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_COMMON_H_
 #define CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_COMMON_H_
 
 #include "printing/features/features.h"
 
 namespace content {
+class RenderFrameHost;
 class WebContents;
 }
 
 namespace printing {
 
 // Start printing using the appropriate PrintViewManagerBase subclass.
 void StartPrint(content::WebContents* web_contents,
                 bool print_preview_disabled,
-                bool selection_only);
+                bool has_selection);
 
 #if BUILDFLAG(ENABLE_BASIC_PRINTING)
 // Start printing using the system print dialog.
 void StartBasicPrint(content::WebContents* contents);
 #endif
 
+// If the user has selected text in the currently focused frame, print only that
+// frame (this makes print selection work for multiple frames).
+content::RenderFrameHost* GetFrameToPrint(content::WebContents* contents);
+
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_COMMON_H_