Reallocate encoded buffer size if needed for VP8. Initially set to the input image size.

webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.cc

Index: webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.cc b/webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.cc
index f23affee41d454dc0479bf03a163b14d4dbe99bb..9d57dc0996a23732d6a154ca1c70cbbcfd3107df 100644
--- a/webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.cc
@@ -63,6 +63,10 @@ TEST_F(TestVp8Impl, TestSwitchingToOneOddStream) {
   TestVp8Simulcast::TestSwitchingToOneOddStream();
 }
 
+TEST_F(TestVp8Impl, TestSwitchingToOneSmallStream) {
+  TestVp8Simulcast::TestSwitchingToOneSmallStream();
+}
+
 TEST_F(TestVp8Impl, TestRPSIEncoder) {
   TestVp8Simulcast::TestRPSIEncoder();
 }