Change TWCC send interval to reduce overhead on low BW situations.

webrtc/base/test/mock_ratetracker.h

+/*
+ *  Copyright (c) 2016 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.
+ */
+
+#ifndef WEBRTC_BASE_TEST_MOCK_RATETRACKER_H_
+#define WEBRTC_BASE_TEST_MOCK_RATETRACKER_H_
+
+#include "webrtc/base/ratetracker.h"
+
+#include "webrtc/test/gmock.h"
+
+namespace rtc {
+
+class MockRateTracker : public RateTracker {
+ public:
+  MockRateTracker() : RateTracker(1000, 1) {}
+
+  MOCK_CONST_METHOD1(ComputeRateForInterval,
+                     double(int64_t interval_milliseconds));
+  MOCK_CONST_METHOD0(ComputeRate, double());
+  MOCK_CONST_METHOD0(ComputeTotalRate, double());
+  MOCK_CONST_METHOD0(TotalSampleCount, size_t());
+  MOCK_METHOD1(AddSamples, void(size_t sample_count));
+  MOCK_CONST_METHOD0(Time, int64_t());
+};
+
+}  // namespace rtc
+
+#endif  // WEBRTC_BASE_TEST_MOCK_RATETRACKER_H_