Upstream printing changes.

android_webview/java/src/org/chromium/android_webview/AwContents.java

Index: android_webview/java/src/org/chromium/android_webview/AwContents.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContents.java b/android_webview/java/src/org/chromium/android_webview/AwContents.java
index d962d9f292d144a1577c06d4da1afe675f3961b7..6f3f47ae26c4f82fd4c2e4a65fa75c77ef9bd79c 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -194,6 +194,8 @@ public class AwContents {
 
     private ComponentCallbacks2 mComponentCallbacks;
 
+    private AwPdfExporter mAwPdfExporter;
+
     private static final class DestroyRunnable implements Runnable {
         private int mNativeAwContents;
         private DestroyRunnable(int nativeAwContents) {
@@ -705,6 +707,18 @@ public class AwContents {
         return mSettings;
     }
 
+    public AwPdfExporter getPdfExporter() {
+        // mNativeAwContents can be null, due to destroy().
+        if (mNativeAwContents == 0) {
+            return null;
+        }
+        if (mAwPdfExporter == null) {
+            mAwPdfExporter = new AwPdfExporter(mContainerView);
+            nativeCreatePdfExporter(mNativeAwContents, mAwPdfExporter);
+        }
+        return mAwPdfExporter;
+    }
+
     public static void setAwDrawSWFunctionTable(int functionTablePointer) {
         nativeSetAwDrawSWFunctionTable(functionTablePointer);
     }
@@ -2085,4 +2099,7 @@ public class AwContents {
     private native void nativeSetJsOnlineProperty(int nativeAwContents, boolean networkUp);
 
     private native void nativeTrimMemory(int nativeAwContents, int level);
+
+    private native void nativeCreatePdfExporter(
+            int nativeAwContents, AwPdfExporter awPdfExporter);
 }