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 edc2347e16c4a0995160b437bb6a39a6e26a1f45..ff04f0071cfa9e4c51074f30eea403e42aadcd2b 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -193,6 +193,8 @@ public class AwContents {
 
     private ComponentCallbacks2 mComponentCallbacks;
 
+    private AwPdfExporter mAwPdfExporter;
+
     private static final class DestroyRunnable implements Runnable {
         private final int mNativeAwContents;
         private DestroyRunnable(int nativeAwContents) {
@@ -691,6 +693,18 @@ 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);
     }
@@ -2077,4 +2091,7 @@ 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);
 }