Enable platform echo cancellation through the AudioRecord path.

media/audio/audio_parameters.cc

Index: media/audio/audio_parameters.cc
diff --git a/media/audio/audio_parameters.cc b/media/audio/audio_parameters.cc
index b7ea4870c23c2bf5f6b51c2bfbfaa5279c566ef1..fff815610fe52629ef0b96d6ad5897c26126d01b 100644
--- a/media/audio/audio_parameters.cc
+++ b/media/audio/audio_parameters.cc
@@ -16,7 +16,8 @@ AudioParameters::AudioParameters()
       bits_per_sample_(0),
       frames_per_buffer_(0),
       channels_(0),
-      input_channels_(0) {
+      input_channels_(0),
+      effects_(NO_EFFECTS) {
 }
 
 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
@@ -28,20 +29,38 @@ AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
       bits_per_sample_(bits_per_sample),
       frames_per_buffer_(frames_per_buffer),
       channels_(ChannelLayoutToChannelCount(channel_layout)),
-      input_channels_(0) {
+      input_channels_(0),
+      effects_(NO_EFFECTS) {
 }
 
 AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
                                  int input_channels,
                                  int sample_rate, int bits_per_sample,
-                                 int frames_per_buffer)
+                                 int frames_per_buffer, int effects)
     : format_(format),
       channel_layout_(channel_layout),
       sample_rate_(sample_rate),
       bits_per_sample_(bits_per_sample),
       frames_per_buffer_(frames_per_buffer),
       channels_(ChannelLayoutToChannelCount(channel_layout)),
-      input_channels_(input_channels) {
+      input_channels_(input_channels),
+      effects_(effects) {
+}
+
+AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
+                                 int channels, int input_channels,
+                                 int sample_rate, int bits_per_sample,
+                                 int frames_per_buffer, int effects)
+    : format_(format),
+      channel_layout_(channel_layout),
+      sample_rate_(sample_rate),
+      bits_per_sample_(bits_per_sample),
+      frames_per_buffer_(frames_per_buffer),
+      channels_(channels),
+      input_channels_(input_channels),
+      effects_(effects) {
+  if (channel_layout != CHANNEL_LAYOUT_DISCRETE)
+    DCHECK_EQ(channels, ChannelLayoutToChannelCount(channel_layout));
 }
 
 void AudioParameters::Reset(Format format, ChannelLayout channel_layout,
@@ -95,9 +114,4 @@ base::TimeDelta AudioParameters::GetBufferDuration() const {
       static_cast<float>(sample_rate_));
 }
 
-void AudioParameters::SetDiscreteChannels(int channels) {
-  channel_layout_ = CHANNEL_LAYOUT_DISCRETE;
-  channels_ = channels;
-}
-
 }  // namespace media