Change to use local Random object instead of global rand() in the RtcEventLog unit test.

webrtc/test/random.h

Index: webrtc/test/random.h
diff --git a/webrtc/test/random.h b/webrtc/test/random.h
index 5cc54f212970c8269cf2093c199ef6be55fb4a45..c7254a9b4946e41f6e62d333af79bfd45dad5e96 100644
--- a/webrtc/test/random.h
+++ b/webrtc/test/random.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_TEST_RANDOM_H_
 #define WEBRTC_TEST_RANDOM_H_
 
+#include <limits>
+
 #include "webrtc/typedefs.h"
 #include "webrtc/base/constructormagic.h"
 
@@ -22,11 +24,22 @@ class Random {
  public:
   explicit Random(uint32_t seed);
 
-  // Return pseudo-random number in the interval [0.0, 1.0).
-  float Rand();
+  // Return pseudo-random integer of the specified type.
+  template <typename T>
+  T Rand() {
+    static_assert(std::numeric_limits<T>::is_integer &&
+                      std::numeric_limits<T>::radix == 2 &&
+                      std::numeric_limits<T>::digits <= 32,
+                  "Rand is only supported for built-in integer types that are "
+                  "32 bits or smaller.");
+    return static_cast<T>(Rand(std::numeric_limits<uint32_t>::max()));
+  }
+
+  // Uniformly distributed pseudo-random number in the interval [0, t].
+  uint32_t Rand(uint32_t t);
 
-  // Return pseudo-random number mapped to the interval [low, high].
-  int Rand(int low, int high);
+  // Uniformly distributed pseudo-random number in the interval [low, high].
+  uint32_t Rand(uint32_t low, uint32_t high);
 
   // Normal Distribution.
   int Gaussian(int mean, int standard_deviation);
@@ -43,6 +56,15 @@ class Random {
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Random);
 };
+
+// Return pseudo-random number in the interval [0.0, 1.0).
+template <>
+float Random::Rand<float>();
+
+// Return pseudo-random boolean value.
+template <>
+bool Random::Rand<bool>();
+
 }  // namespace test
 }  // namespace webrtc