Remove ProcessingComponent's dependence on AudioProcessingImpl.

- Move needed accessors to AudioProcessing.
- Inject the crit directly as a dependency.
- Remove the now unneeded EchoCancellationImplWrapper.

BUG=2894
R=aluebs@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/9199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5620 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/include/mock_audio_processing.h

@@ -191,6 +191,8 @@ class MockAudioProcessing : public AudioProcessing {
       int(int rate));
   MOCK_CONST_METHOD0(sample_rate_hz,
       int());
+  MOCK_CONST_METHOD0(split_sample_rate_hz,
+      int());
   MOCK_METHOD2(set_num_channels,
       int(int input_channels, int output_channels));
   MOCK_CONST_METHOD0(num_input_channels,
@@ -213,6 +215,8 @@ class MockAudioProcessing : public AudioProcessing {
       int(int delay));
   MOCK_CONST_METHOD0(stream_delay_ms,
       int());
+  MOCK_CONST_METHOD0(was_stream_delay_set,
+      bool());
   MOCK_METHOD1(set_stream_key_pressed,
       void(bool key_pressed));
   MOCK_CONST_METHOD0(stream_key_pressed,