Support the Aec dump for the APM in chrome

content/renderer/media/media_stream_dependency_factory.cc

Index: content/renderer/media/media_stream_dependency_factory.cc
diff --git a/content/renderer/media/media_stream_dependency_factory.cc b/content/renderer/media/media_stream_dependency_factory.cc
index be33d64dc5fe5744042734105fbf7b80226edfb8..1414de48429a0eaa0d036d427f7d47308d7b077c 100644
--- a/content/renderer/media/media_stream_dependency_factory.cc
+++ b/content/renderer/media/media_stream_dependency_factory.cc
@@ -753,6 +753,15 @@ bool MediaStreamDependencyFactory::OnControlMessageReceived(
 void MediaStreamDependencyFactory::OnAecDumpFile(
     IPC::PlatformFileForTransit file_handle) {
   DCHECK_EQ(aec_dump_file_, base::kInvalidPlatformFileValue);
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableAudioTrackProcessing)) {
+    EnsureWebRtcAudioDeviceImpl();
+    GetWebRtcAudioDevice()->EnableAecDump(file_handle);

[Henrik Grunell, 2014/03/06 10:12:20]

Have WebRtcAudioDeviceImpl::EnableAecDump take a base::PlatformFile instead and
use IPC::PlatformFileForTransitToPlatformFile here.

[no longer working on chromium, 2014/03/06 18:57:21]

Done.

+    return;
+  }
+
+  // TODO(xians): Remove the following code after kEnableAudioTrackProcessing

[Henrik Grunell, 2014/03/06 10:12:20]

It shouldn't be removed when the flag is on by default, but when the flag is
removed.

[no longer working on chromium, 2014/03/06 18:57:21]

Done.

+  // is on by default.
   if (PeerConnectionFactoryCreated()) {
     base::PlatformFile file =
         IPC::PlatformFileForTransitToPlatformFile(file_handle);
@@ -765,6 +774,14 @@ void MediaStreamDependencyFactory::OnAecDumpFile(
 }
 
 void MediaStreamDependencyFactory::OnDisableAecDump() {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableAudioTrackProcessing)) {
+    GetWebRtcAudioDevice()->DisableAecDump();
+    return;
+  }
+
+  // TODO(xians): Remove the following code after kEnableAudioTrackProcessing
+  // is on by default.
   if (aec_dump_file_ != base::kInvalidPlatformFileValue)
     base::ClosePlatformFile(aec_dump_file_);
   aec_dump_file_ = base::kInvalidPlatformFileValue;