Revert "With these changes we will assume that the capture time of a frame is based on NTP time. This makes the interface of video engine more well defined and makes it easier and cleaner to handle user provided capture timestamps."

This reverts commit 4954b3650192d78037714138a5c519ef08f2670e.
Reverts r3799

TBR=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1308004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3802 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/interface/clock.h b/webrtc/system_wrappers/interface/clock.h
index 177e18f..7a946d9 100644
--- a/webrtc/system_wrappers/interface/clock.h
+++ b/webrtc/system_wrappers/interface/clock.h
@@ -34,15 +34,9 @@
   // source is fixed for this clock.
   virtual int64_t TimeInMicroseconds() = 0;
 
-  // Retrieve an NTP absolute timestamp in seconds and fractions of a second.
+  // Retrieve an NTP absolute timestamp.
   virtual void CurrentNtp(uint32_t& seconds, uint32_t& fractions) = 0;
 
-  // Retrieve an NTP absolute timestamp in milliseconds.
-  virtual int64_t CurrentNtpInMilliseconds() = 0;
-
-  // Converts an NTP timestamp to a millisecond timestamp.
-  static int64_t NtpToMs(uint32_t seconds, uint32_t fractions);
-
   // Returns an instance of the real-time system clock implementation.
   static Clock* GetRealTimeClock();
 };
@@ -61,12 +55,9 @@
   // source is fixed for this clock.
   virtual int64_t TimeInMicroseconds();
 
-  // Retrieve an NTP absolute timestamp in milliseconds.
+  // Retrieve an NTP absolute timestamp.
   virtual void CurrentNtp(uint32_t& seconds, uint32_t& fractions);
 
-  // Converts an NTP timestamp to a millisecond timestamp.
-  virtual int64_t CurrentNtpInMilliseconds();
-
   // Advance the simulated clock with a given number of milliseconds or
   // microseconds.
   void AdvanceTimeMilliseconds(int64_t milliseconds);