[android_webview] Forward the InternalAccessDelegate interface via AwContents.

This change introduces a new public InternalAccessDelegate interface
on AwContents.
The purpose of the new interface is to support adding new internal
access methods that are required by AwContents but not by
ContentViewCore. An added benefit is isolating the embedder from
one more org.chromium.content.* type.

BUG=None
TEST=compile
Java-only change.
NOTRY=true


Review URL: https://chromiumcodereview.appspot.com/11828045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176086 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -77,6 +77,13 @@ public class AwContents {
         public String imgSrc;
     }
 
+    /**
+     * Interface that consumers of {@link AwContents} must implement to allow the proper
+     * dispatching of view methods through the containing view.
+     */
+    public interface InternalAccessDelegate extends ContentViewCore.InternalAccessDelegate {
+    }
+
     private int mNativeAwContents;
     private ViewGroup mContainerView;
     private ContentViewCore mContentViewCore;