Enable page selection for WebView printing

android_webview/java/src/org/chromium/android_webview/AwPdfExporter.java

 // Copyright 2013 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.
 
 package org.chromium.android_webview;
 
 import android.annotation.SuppressLint;
 import android.os.CancellationSignal;
 import android.os.ParcelFileDescriptor;
 import android.print.PrintAttributes;
@@ skipping 28 matching lines @@
     private ViewGroup mContainerView;
 
     AwPdfExporter(ViewGroup containerView) {
         setContainerView(containerView);
     }
 
     public void setContainerView(ViewGroup containerView) {
         mContainerView = containerView;
     }
 
-    public void exportToPdf(final ParcelFileDescriptor fd, PrintAttributes attributes,
+    public void exportToPdf(final ParcelFileDescriptor fd, PrintAttributes attributes, int[] pages,
             ValueCallback<Boolean> resultCallback, CancellationSignal cancellationSignal) {
-
         if (fd == null) {
             throw new IllegalArgumentException("fd cannot be null");
         }
         if (resultCallback == null) {
             throw new IllegalArgumentException("resultCallback cannot be null");
         }
         if (mResultCallback != null) {
             throw new IllegalStateException("printing is already pending");
         }
         if (attributes.getMediaSize() == null) {
             throw new  IllegalArgumentException("attributes must specify a media size");
         }
         if (attributes.getResolution() == null) {
             throw new IllegalArgumentException("attributes must specify print resolution");
         }
         if (attributes.getMinMargins() == null) {
             throw new IllegalArgumentException("attributes must specify margins");
         }
         if (mNativeAwPdfExporter == 0) {
             resultCallback.onReceiveValue(false);
             return;
         }
         mResultCallback = resultCallback;
         mAttributes = attributes;
         mFd = fd;
-        nativeExportToPdf(mNativeAwPdfExporter, mFd.getFd(), cancellationSignal);
+        nativeExportToPdf(mNativeAwPdfExporter, mFd.getFd(), pages, cancellationSignal);
     }
 
     @CalledByNative
     private void setNativeAwPdfExporter(long nativePdfExporter) {
         mNativeAwPdfExporter = nativePdfExporter;
         // Handle the cornercase that the native side is destroyed (for example
         // via Webview.Destroy) before it has a chance to complete the pdf exporting.
         if (nativePdfExporter == 0 && mResultCallback != null) {
             try {
                 mResultCallback.onReceiveValue(false);
@@ skipping 54 matching lines @@
     @CalledByNative
     private int getTopMargin() {
         return mAttributes.getMinMargins().getTopMils();
     }
 
     @CalledByNative
     private int getBottomMargin() {
         return mAttributes.getMinMargins().getBottomMils();
     }
 
-    private native void nativeExportToPdf(long nativeAwPdfExporter, int fd,
-            CancellationSignal cancellationSignal);
+    private native void nativeExportToPdf(
+            long nativeAwPdfExporter, int fd, int[] pages, CancellationSignal cancellationSignal);
 }