Enable page selection for WebView printing

android_webview/browser/aw_print_manager.h

Index: android_webview/browser/aw_print_manager.h
diff --git a/android_webview/browser/aw_print_manager.h b/android_webview/browser/aw_print_manager.h
index 0e36b2c701ba702d3229622e7686aec3f2681f86..cc99f3fe5702836a75b7d78fc39e5210158cbc54 100644
--- a/android_webview/browser/aw_print_manager.h
+++ b/android_webview/browser/aw_print_manager.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "components/printing/browser/print_manager.h"
+#include "components/printing/common/print_messages.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "printing/print_settings.h"
 
@@ -43,6 +44,10 @@ class AwPrintManager : public printing::PrintManager,
   void OnGetDefaultPrintSettings(content::RenderFrameHost* render_frame_host,
                                  IPC::Message* reply_msg);
 
+  void OnScriptedPrint(content::RenderFrameHost* render_frame_host,
+                       const PrintHostMsg_ScriptedPrint_Params& params,
+                       IPC::Message* reply_msg);
+
   printing::PrintSettings settings_;
 
   DISALLOW_COPY_AND_ASSIGN(AwPrintManager);