Fix the scale of Drag and Drop shadow image.

ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.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.content.ClipData;
 import android.graphics.Bitmap;
 import android.os.Build;
 import android.view.View;
@@ skipping 71 matching lines @@
 
     /**
      * Drag the text out of current view.
      * @param text The dragged text.
      * @param shadowImage The shadow image for the dragged text.
      */
     @SuppressWarnings("deprecation")
     // TODO(hush): uncomment below when we build with API 24.
     // @TargetApi(Build.VERSION_CODES.N)
     @CalledByNative
-    private boolean startDragAndDrop(String text, Bitmap shadowImage) {
+    private boolean startDragAndDrop(String text, Bitmap shadowImage, float pageScale) {
         if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) return false;
 
         ViewGroup containerView = getContainerView();
         if (containerView == null) return false;
 
         ImageView imageView = new ImageView(containerView.getContext());
         imageView.setImageBitmap(shadowImage);
-        imageView.layout(0, 0, shadowImage.getWidth(), shadowImage.getHeight());
+        // The width and height of shadowImage are already normalized by DIP scale. Now we just
+        // need to normalize it by page scale.
+        imageView.layout(0, 0, (int) (shadowImage.getWidth() * pageScale),
+                (int) (shadowImage.getHeight() * pageScale));
 
         // TODO(hush): use View#startDragAndDrop when Chromium starts to build with API 24.
         return containerView.startDrag(ClipData.newPlainText(null, text),
                 new View.DragShadowBuilder(imageView), null, DRAG_FLAG_GLOBAL);
     }
 
     /**
      * @return container view that the anchor views are added to. May be null.
      */
     public abstract ViewGroup getContainerView();
@@ skipping 13 matching lines @@
                 return this;
             }
 
             @Override
             public ViewGroup getContainerView() {
                 return mContainerView;
             }
         }.init(containerView);
     }
 }