Add aecdump support to audioproc_f

webrtc/system_wrappers/include/tick_util.h

Index: webrtc/system_wrappers/include/tick_util.h
diff --git a/webrtc/system_wrappers/include/tick_util.h b/webrtc/system_wrappers/include/tick_util.h
index 6e3b05edb23d77e9e164550e0e004e22481d9afa..f8a5ef77770fd23d8eb510f646f5193ed954dff2 100644
--- a/webrtc/system_wrappers/include/tick_util.h
+++ b/webrtc/system_wrappers/include/tick_util.h
@@ -85,6 +85,7 @@ class TickTime {
 class TickInterval {
  public:
   TickInterval();
+  explicit TickInterval(int64_t interval);
 
   int64_t Milliseconds() const;
   int64_t Microseconds() const;
@@ -105,8 +106,6 @@ class TickInterval {
   friend bool operator>=(const TickInterval& lhs, const TickInterval& rhs);
 
  private:
-  explicit TickInterval(int64_t interval);
-
   friend class TickTime;
   friend TickInterval operator-(const TickTime& lhs, const TickTime& rhs);