Add javatests for the WebView SafeBrowsing feature

android_webview/javatests/src/org/chromium/android_webview/test/util/GraphicsTestUtils.java

 // Copyright 2015 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.android_webview.test.util;
 
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.view.View;
 
 import org.chromium.android_webview.AwContents;
 import org.chromium.android_webview.test.AwTestBase;
+import org.chromium.android_webview.test.AwTestContainerView;
 import org.chromium.base.ThreadUtils;
 
 import java.util.concurrent.Callable;
 
 /**
  * Graphics-related test utils.
  */
 public class GraphicsTestUtils {
     /**
      * Draws the supplied {@link AwContents} into the returned {@link Bitmap}.
@@ skipping 48 matching lines @@
     public static int sampleBackgroundColorOnUiThread(final AwContents awContents)
             throws Exception {
         return ThreadUtils.runOnUiThreadBlocking(new Callable<Integer>() {
             @Override
             public Integer call() throws Exception {
                 return drawAwContents(awContents, 10, 10, 0, 0).getPixel(0, 0);
             }
         });
     }
 
+    // Gets the pixel color at the center of AwContents.
+    public static int getPixelColorAtCenterOfView(
+            final AwContents awContents, final AwTestContainerView testContainerView) {
+        return ThreadUtils.runOnUiThreadBlockingNoException(new Callable<Integer>() {
+            @Override
+            public Integer call() {
+                return drawAwContents(awContents, 2, 2, -(float) testContainerView.getWidth() / 2,
+                        -(float) testContainerView.getHeight() / 2)
+                        .getPixel(0, 0);
+            }
+        });
+    }
+
     public static void pollForBackgroundColor(final AwContents awContents, final int c)
             throws Throwable {
         AwTestBase.pollInstrumentationThread(new Callable<Boolean>() {
             @Override
             public Boolean call() throws Exception {
                 return sampleBackgroundColorOnUiThread(awContents) == c;
             }
         });
     }
 
     private static Bitmap doDrawAwContents(
             AwContents awContents, int width, int height, Float dx, Float dy) {
         Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
         Canvas canvas = new Canvas(bitmap);
         if (dx != null && dy != null) {
             canvas.translate(dx, dy);
         }
         awContents.onDraw(canvas);
         return bitmap;
     }
 }