Factor out ContentViewAndroidDelegate

ui/android/java/src/org/chromium/ui/base/WindowAndroid.java

 // Copyright 2012 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.ui.base;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.PendingIntent;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.Intent;
 import android.content.pm.PackageManager;
-import android.graphics.Bitmap;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Process;
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityManager;
 
 import org.chromium.base.Callback;
@@ skipping 616 matching lines @@
      * setWillNotDraw(false) to ensure that the animation is drawn over the SurfaceView,
      * and otherwise we call setWillNotDraw(true).
      */
     private void refreshWillNotDraw() {
         boolean willNotDraw = !mIsTouchExplorationEnabled && mAnimationsOverContent.isEmpty();
         if (mAnimationPlaceholderView.willNotDraw() != willNotDraw) {
             mAnimationPlaceholderView.setWillNotDraw(willNotDraw);
         }
     }
 
-    /**
-     * Starts drag and drop operation on a ViewAndroid whose delegate is viewAndroidDelegate.
-     */
-    @CalledByNative
-    private void startDragAndDrop(
-            ViewAndroidDelegate viewAndroidDelegate, String text, Bitmap shadowImage) {
-        viewAndroidDelegate.startDragAndDrop(text, shadowImage);
-    }
-
     private native long nativeInit();
     private native void nativeOnVSync(long nativeWindowAndroid,
                                       long vsyncTimeMicros,
                                       long vsyncPeriodMicros);
     private native void nativeOnVisibilityChanged(long nativeWindowAndroid, boolean visible);
     private native void nativeOnActivityStopped(long nativeWindowAndroid);
     private native void nativeOnActivityStarted(long nativeWindowAndroid);
     private native void nativeDestroy(long nativeWindowAndroid);
 
 }