Change random number generator for tests to SkMWCRandom

tests/StreamTest.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Test.h"
 #include "SkRandom.h"
 #include "SkStream.h"
 #include "SkData.h"
 
 #ifndef SK_BUILD_FOR_WIN
 #include <unistd.h>
 #include <fcntl.h>
 #endif
 
 #define MAX_SIZE    (256 * 1024)
 
-static void random_fill(SkRandom& rand, void* buffer, size_t size) {
+static void random_fill(SkMWCRandom& rand, void* buffer, size_t size) {
     char* p = (char*)buffer;
     char* stop = p + size;
     while (p < stop) {
         *p++ = (char)(rand.nextU() >> 8);
     }
 }
 
 static void test_buffer(skiatest::Reporter* reporter) {
-    SkRandom rand;
+    SkMWCRandom rand;
     SkAutoMalloc am(MAX_SIZE * 2);
     char* storage = (char*)am.get();
     char* storage2 = storage + MAX_SIZE;
 
     random_fill(rand, storage, MAX_SIZE);
 
     for (int sizeTimes = 0; sizeTimes < 100; sizeTimes++) {
         int size = rand.nextU() % MAX_SIZE;
         if (size == 0) {
             size = MAX_SIZE;
@@ skipping 15 matching lines @@
             }
             REPORTER_ASSERT(reporter, bytesRead == size);
         }
     }
 }
 
 static void TestRStream(skiatest::Reporter* reporter) {
     static const char s[] =
         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
     char            copy[sizeof(s)];
-    SkRandom        rand;
+    SkMWCRandom        rand;
 
     for (int i = 0; i < 65; i++) {
         char*           copyPtr = copy;
         SkMemoryStream  mem(s, sizeof(s));
         SkBufferStream  buff(&mem, i);
 
         do {
             copyPtr += buff.read(copyPtr, rand.nextU() & 15);
         } while (copyPtr < copy + sizeof(s));
         REPORTER_ASSERT(reporter, copyPtr == copy + sizeof(s));
@@ skipping 135 matching lines @@
 
 static void TestStreams(skiatest::Reporter* reporter) {
     TestRStream(reporter);
     TestWStream(reporter);
     TestPackedUInt(reporter);
     TestNullData();
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS("Stream", StreamTestClass, TestStreams)