Add stub implementations to new WebViewDelegate methods.

android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java

 // Copyright 2014 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 com.android.webview.chromium;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.assist.AssistStructure.ViewNode;
 import android.content.Context;
@@ skipping 2081 matching lines @@
                 @Override
                 public void run() {
                     setLayerType(layerType, paint);
                 }
             });
             return;
         }
         mAwContents.setLayerType(layerType, paint);
     }
 
+    // Overrides method added to WebViewProvider.ViewDelegate interface
+    // (not called in M and below)
+    public Handler getHandler(Handler originalHandler) {
+        return originalHandler;
+    }
+
+    // Overrides method added to WebViewProvider.ViewDelegate interface
+    // (not called in M and below)
+    public View findFocus(View originalFocusedView) {
+        return originalFocusedView;
+    }
+
     // Remove from superclass
     public void preDispatchDraw(Canvas canvas) {
         // TODO(leandrogracia): remove this method from WebViewProvider if we think
         // we won't need it again.
     }
 
     public void onStartTemporaryDetach() {
         mAwContents.onStartTemporaryDetach();
     }
 
@@ skipping 218 matching lines @@
         mAwContents.extractSmartClipData(x, y, width, height);
     }
 
     // Implements SmartClipProvider
     @Override
     public void setSmartClipResultHandler(final Handler resultHandler) {
         checkThread();
         mAwContents.setSmartClipResultHandler(resultHandler);
     }
 }