Makes the sid of a closed DataChannel available to reuse per the spec.

BUG=2646
R=pthatcher@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/16579004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6468 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/base/common.cc

@@ -78,4 +78,12 @@ void LogAssert(const char* function, const char* file, int line,
   }
 }
 
+bool IsOdd(int n) {
+  return (n & 0x1);
+}
+
+bool IsEven(int n) {
+  return !IsOdd(n);
+}
+
 } // namespace talk_base

talk/base/common.h

@@ -116,6 +116,10 @@ typedef void (*AssertLogger)(const char* function,
 // only by one component.
 void SetCustomAssertLogger(AssertLogger logger);
 
+bool IsOdd(int n);
+
+bool IsEven(int n);
+
 }  // namespace talk_base
 
 #if ENABLE_DEBUG