Implement window.print() on Android

chrome/browser/printing/print_job_worker.h

Index: chrome/browser/printing/print_job_worker.h
diff --git a/chrome/browser/printing/print_job_worker.h b/chrome/browser/printing/print_job_worker.h
index a8378bb2353de2cd98746c087bfb5e02a595bba6..cadd2c62f030c5f8dd77d5afacbf32c4b376215c 100644
--- a/chrome/browser/printing/print_job_worker.h
+++ b/chrome/browser/printing/print_job_worker.h
@@ -9,6 +9,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
+#include "chrome/browser/printing/printer_query.h"
 #include "content/public/browser/browser_thread.h"
 #include "printing/page_number.h"
 #include "printing/print_job_constants.h"
@@ -39,13 +40,18 @@ class PrintJobWorker {
 
   void SetNewOwner(PrintJobWorkerOwner* new_owner);
 
-  // Initializes the print settings. If |ask_user_for_settings| is true, a
-  // Print... dialog box will be shown to ask the user his preference.
+  // Initializes the print settings. If |ask_settings_type| is ASK_USER, a
+  // Print... dialog box will be shown by the browser to ask the user his
+  // preference. If it is SYSTEM_SPECIFIC, showing that dialog box will be
+  // delegated to the system. It's used for script printing on android
+  // (see https://codereview.chromium.org/740983002/)
+  // (TODO: doc)
   void GetSettings(
-      bool ask_user_for_settings,
+      PrinterQuery::GetSettingsAskParam ask_settings_type,
       int document_page_count,
       bool has_selection,
-      MarginType margin_type);
+      MarginType margin_type,
+      bool is_scripted);
 
   // Set the new print settings.
   void SetSettings(scoped_ptr<base::DictionaryValue> new_settings);
@@ -108,7 +114,8 @@ class PrintJobWorker {
   // but sticks with this for consistency.
   void GetSettingsWithUI(
       int document_page_count,
-      bool has_selection);
+      bool has_selection,
+      bool is_scripted);
 
   // The callback used by PrintingContext::GetSettingsWithUI() to notify this
   // object that the print settings are set.  This is needed in order to bounce