Remove AudioCodingModule's dependency on the Module interface

BUG=3520
COAUTHOR=kwiberg@webrtc.org
R=minyue@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/42069004

Cr-Commit-Position: refs/heads/master@{#8500}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8500 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
index ddc3681..694900a 100644
--- a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
+++ b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.cc
@@ -218,19 +218,6 @@
                "Destroyed");
 }
 
-// Returns the number of milliseconds until the module want a
-// worker thread to call Process.
-int64_t AudioCodingModuleImpl::TimeUntilNextProcess() {
-  CriticalSectionScoped lock(acm_crit_sect_);
-
-  if (!HaveValidEncoder("TimeUntilNextProcess")) {
-    return -1;
-  }
-  FATAL() << "Dead code?";
-//  return codecs_[current_send_codec_idx_]->SamplesLeftToEncode() /
-//      (send_codec_inst_.plfreq / 1000);
-}
-
 int32_t AudioCodingModuleImpl::Process() {
   CriticalSectionScoped lock(acm_crit_sect_);
   return last_encode_value_;
diff --git a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
index 191fa69..aa8d366 100644
--- a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
+++ b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
@@ -35,10 +35,6 @@
   explicit AudioCodingModuleImpl(const AudioCodingModule::Config& config);
   ~AudioCodingModuleImpl();
 
-  // Returns the number of milliseconds until the module want a worker thread
-  // to call Process.
-  virtual int64_t TimeUntilNextProcess() OVERRIDE;
-
   // Process any pending tasks such as timeouts.
   virtual int32_t Process() OVERRIDE;
 
diff --git a/webrtc/modules/audio_coding/main/interface/audio_coding_module.h b/webrtc/modules/audio_coding/main/interface/audio_coding_module.h
index a039802..f14ff80 100644
--- a/webrtc/modules/audio_coding/main/interface/audio_coding_module.h
+++ b/webrtc/modules/audio_coding/main/interface/audio_coding_module.h
@@ -74,7 +74,7 @@
       const uint16_t delayMS) = 0;  // average delay in ms
 };
 
-class AudioCodingModule: public Module {
+class AudioCodingModule {
  protected:
   AudioCodingModule() {}
 
@@ -101,6 +101,8 @@
   static AudioCodingModule* Create(int id, Clock* clock);
   virtual ~AudioCodingModule() {};
 
+  virtual int32_t Process() = 0;
+
   ///////////////////////////////////////////////////////////////////////////
   //   Utility functions
   //