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

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

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 592 matching lines @@
            input_frame_.allocated_size(kUPlane));
     memset(input_frame_.buffer(kVPlane), 0,
            input_frame_.allocated_size(kVPlane));
     EXPECT_EQ(0, encoder_->Encode(input_frame_, NULL, &frame_types));
   }
 
   void TestSwitchingToOneStream() { SwitchingToOneStream(1024, 768); }
 
   void TestSwitchingToOneOddStream() { SwitchingToOneStream(1023, 769); }
 
+  void TestSwitchingToOneSmallStream() { SwitchingToOneStream(4, 4); }
+
   void TestRPSIEncoder() {
     Vp8TestEncodedImageCallback encoder_callback;
     encoder_->RegisterEncodeCompleteCallback(&encoder_callback);
 
     encoder_->SetRates(kMaxBitrates[2], 30);  // To get all three streams.
 
     EXPECT_EQ(0, encoder_->Encode(input_frame_, NULL, NULL));
     int picture_id = -1;
     int temporal_layer = -1;
     bool layer_sync = false;
@@ skipping 324 matching lines @@
   rtc::scoped_ptr<VP8Decoder> decoder_;
   MockDecodedImageCallback decoder_callback_;
   VideoCodec settings_;
   VideoFrame input_frame_;
 };
 
 }  // namespace testing
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SIMULCAST_UNITTEST_H_