Lock scheme #8: Introduced the new locking scheme

webrtc/modules/audio_processing/high_pass_filter_impl.cc

Index: webrtc/modules/audio_processing/high_pass_filter_impl.cc
diff --git a/webrtc/modules/audio_processing/high_pass_filter_impl.cc b/webrtc/modules/audio_processing/high_pass_filter_impl.cc
index 6302f13fcf985081c2c3fdf8e63addc5dba4225e..7a96252232cfc92237d7ee858b5998b78513557d 100644
--- a/webrtc/modules/audio_processing/high_pass_filter_impl.cc
+++ b/webrtc/modules/audio_processing/high_pass_filter_impl.cc
@@ -99,11 +99,8 @@ int Filter(FilterState* hpf, int16_t* data, size_t length) {
 
 typedef FilterState Handle;
 
-HighPassFilterImpl::HighPassFilterImpl(const AudioProcessing* apm,
-                                       CriticalSectionWrapper* crit)
-  : ProcessingComponent(),
-    apm_(apm),
-    crit_(crit) {}
+HighPassFilterImpl::HighPassFilterImpl(const AudioProcessing* apm)
+    : ProcessingComponent(), apm_(apm) {}
 
 HighPassFilterImpl::~HighPassFilterImpl() {}
 
@@ -131,7 +128,6 @@ int HighPassFilterImpl::ProcessCaptureAudio(AudioBuffer* audio) {
 }
 
 int HighPassFilterImpl::Enable(bool enable) {
-  CriticalSectionScoped crit_scoped(crit_);
   return EnableComponent(enable);
 }
 
@@ -148,6 +144,8 @@ void HighPassFilterImpl::DestroyHandle(void* handle) const {
 }
 
 int HighPassFilterImpl::InitializeHandle(void* handle) const {
+  // TODO(peah): Remove dependency on apm for the
+  // capture side sample rate.
   return InitializeFilter(static_cast<Handle*>(handle),
                           apm_->proc_sample_rate_hz());
 }