Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/mock/mock_block_processor.h

Index: webrtc/modules/audio_processing/aec3/mock/mock_block_processor.h
diff --git a/webrtc/modules/audio_processing/aec3/mock/mock_block_processor.h b/webrtc/modules/audio_processing/aec3/mock/mock_block_processor.h
new file mode 100644
index 0000000000000000000000000000000000000000..d73b095e266322d5c6c266b7014df532ea7e15d1
--- /dev/null
+++ b/webrtc/modules/audio_processing/aec3/mock/mock_block_processor.h
@@ -0,0 +1,37 @@
+/*
+ *  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_MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_BLOCK_PROCESSOR_H_
+#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_BLOCK_PROCESSOR_H_
+
+#include <vector>
+
+#include "webrtc/modules/audio_processing/aec3/block_processor.h"
+#include "webrtc/test/gmock.h"
+
+namespace webrtc {
+namespace test {
+
+class MockBlockProcessor : public BlockProcessor {
+ public:
+  virtual ~MockBlockProcessor() {}
+
+  MOCK_METHOD3(ProcessCapture,
+               void(bool known_echo_path_change,
+                    bool saturated_microphone_signal,
+                    std::vector<std::vector<float>>* capture_block));
+  MOCK_METHOD1(BufferRender, bool(std::vector<std::vector<float>>* block));
+  MOCK_METHOD1(ReportEchoLeakage, void(bool leakage_detected));
+};
+
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_BLOCK_PROCESSOR_H_