Fix off-by-one error in PRNG.

webrtc/test/random.h

Index: webrtc/test/random.h
diff --git a/webrtc/test/random.h b/webrtc/test/random.h
index 9a0bc9e9532aae2b70673c72f4085e2961e66cb2..5cc54f212970c8269cf2093c199ef6be55fb4a45 100644
--- a/webrtc/test/random.h
+++ b/webrtc/test/random.h
@@ -22,10 +22,10 @@ class Random {
  public:
   explicit Random(uint32_t seed);
 
-  // Return pseudo-random number in the interval [0.0, 1.0].
+  // Return pseudo-random number in the interval [0.0, 1.0).
   float Rand();
 
-  // Return pseudo rounded random number in interval [low, high].
+  // Return pseudo-random number mapped to the interval [low, high].
   int Rand(int low, int high);
 
   // Normal Distribution.