[Andorid] Migrate to ClipDrawable progress bar.

ui/android/java/src/org/chromium/ui/resources/dynamics/ViewResourceAdapter.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 org.chromium.ui.resources.dynamics;
 
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Rect;
@@ skipping 100 matching lines @@
      */
     public void invalidate(Rect dirtyRect) {
         if (dirtyRect == null) {
             mDirtyRect.set(0, 0, mView.getWidth(), mView.getHeight());
         } else {
             mDirtyRect.union(dirtyRect);
         }
     }
 
     /**
+     * @return Dirty rect that will be drawn on capture.
+     */
+    protected Rect getDirtyRect() {
+        return mDirtyRect;
+    }
+
+    /**
      * Called before {@link #capture(Canvas)} is called.
      * @param canvas    The {@link Canvas} that will be drawn to.
      * @param dirtyRect The dirty {@link Rect} or {@code null} if the entire area is being redrawn.
      */
     protected void onCaptureStart(Canvas canvas, Rect dirtyRect) {
     }
 
     /**
      * Called to draw the {@link View}'s contents into the passed in {@link Canvas}.
      * @param canvas The {@link Canvas} that will be drawn to.
@@ skipping 44 matching lines @@
         if (mBitmap == null) {
             mBitmap = Bitmap.createBitmap(viewWidth, viewHeight, Bitmap.Config.ARGB_8888);
             mBitmap.setHasAlpha(true);
             mDirtyRect.set(0, 0, viewWidth, viewHeight);
             mBitmapSize.set(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
         }
 
         return !isEmpty;
     }
 }