Implement window.print() on Android

printing/printing_context_android.h

Index: printing/printing_context_android.h
diff --git a/printing/printing_context_android.h b/printing/printing_context_android.h
index 32f11be7b766d1795c6df56aeb95aaa2c67b2386..3823b2801530669237ee536f954a07408eef6135 100644
--- a/printing/printing_context_android.h
+++ b/printing/printing_context_android.h
@@ -14,8 +14,7 @@
 
 namespace printing {
 
-// Android subclass of PrintingContext.  The implementation for this header file
-// resides in Chrome for Android repository.  This class communicates with the
+// Android subclass of PrintingContext. This class communicates with the
 // Java side through JNI.
 class PRINTING_EXPORT PrintingContextAndroid : public PrintingContext {
  public:
@@ -30,10 +29,14 @@ class PRINTING_EXPORT PrintingContextAndroid : public PrintingContext {
   // printing operation is canceled.
   void AskUserForSettingsReply(JNIEnv* env, jobject obj, jboolean success);
 
+  // Called from Java, when a printing process initiated by a script finishes.
+  void ShowSystemDialogDone(JNIEnv* env, jobject obj);
+
   // PrintingContext implementation.
   virtual void AskUserForSettings(
       int max_pages,
       bool has_selection,
+      bool is_scripted,
       const PrintSettingsCallback& callback) override;
   virtual Result UseDefaultSettings() override;
   virtual gfx::Size GetPdfPaperSizeDeviceUnits() override;