Implement window.print() on Android

printing/android/java/src/org/chromium/printing/PrintingController.java

Index: printing/android/java/src/org/chromium/printing/PrintingController.java
diff --git a/printing/android/java/src/org/chromium/printing/PrintingController.java b/printing/android/java/src/org/chromium/printing/PrintingController.java
index 92be96820b90d83cd71dc7e3e38e491c4bbca7a2..4807fa69410fdf64fd81eb961587262268bad578 100644
--- a/printing/android/java/src/org/chromium/printing/PrintingController.java
+++ b/printing/android/java/src/org/chromium/printing/PrintingController.java
@@ -82,4 +82,25 @@ public interface PrintingController {
      * @return Whether a complete PDF generation cycle inside Chromium has been completed.
      */
     boolean hasPrintingFinished();
+
+    /**
+     * Starts printing, provided that the current object already has sufficient data to start the
+     * process. (using {@link #setPendingPrint(Printable, PrintManagerDelegate)} for example)
+     *
+     * @param jsOriginatedPrintingContext The printingContext holding the callback to be used to
+     *                                    reply when javascript can resume. When printing is done,
+     *                                    {@link PrintingContextInterface#ShowSystemDialogDone()}
+     *                                    will be called.
+     */
+    void startPendingPrint(PrintingContextInterface jsOriginatedPrintingContext);
+
+    /**
+     * Sets the data required to initiate a printing process. The process can later be started using
+     * {@link #startPendingPrint(PrintingContextInterface)}.
+     *
+     * @param printable An object capable of starting native side PDF generation, i.e. typically
+     *                  a Tab.
+     * @param printManager The print manager that manages the print job.
+     */
+    void setPendingPrint(final Printable printable, final PrintManagerDelegate printManager);
 }