Add GPU integration pixel tests for VP9 and MP4 video.

content/test/gpu/gpu_tests/pixel_test_pages.py

Index: content/test/gpu/gpu_tests/pixel_test_pages.py
diff --git a/content/test/gpu/gpu_tests/pixel_test_pages.py b/content/test/gpu/gpu_tests/pixel_test_pages.py
index 474aefba0498c0d3b7340ace0c0bf5db4cc96d56..0e91760d25333c88f8bc676ae97841c251477626 100644
--- a/content/test/gpu/gpu_tests/pixel_test_pages.py
+++ b/content/test/gpu/gpu_tests/pixel_test_pages.py
@@ -130,6 +130,18 @@ def DefaultPages(base_name):
       base_name + '_SolidColorBackground',
       test_rect=[500, 500, 100, 100],
       revision=1),
+
+    PixelTestPage(
+      'pixel_video_mp4.html',
+      base_name + '_Video_MP4',
+      test_rect=[0, 0, 400, 300],
+      revision=1),
+
+    PixelTestPage(
+      'pixel_video_vp9.html',
+      base_name + '_Video_VP9',
+      test_rect=[0, 0, 400, 300],
+      revision=1),
   ]