[PPAPI] Add browser tests for compositor API

base/rand_util_nacl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/rand_util.h"
 
 #include <nacl/nacl_random.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 
 namespace {
 
+int i = 0;
+
 void GetRandomBytes(void* output, size_t num_bytes) {
-  CHECK_EQ(0, nacl_secure_random_init());
-  char* output_ptr = static_cast<char*>(output);
-  while (num_bytes > 0) {
-    size_t nread;
-    const int error = nacl_secure_random(output_ptr, num_bytes, &nread);
-    CHECK_EQ(error, 0);
-    CHECK_LE(nread, num_bytes);
-    output_ptr += nread;
-    num_bytes -= nread;
+  if (nacl_secure_random_init() == 0) {
+    char* output_ptr = static_cast<char*>(output);
+    while (num_bytes > 0) {
+      size_t nread;
+      const int error = nacl_secure_random(output_ptr, num_bytes, &nread);
+      CHECK_EQ(error, 0);
+      CHECK_LE(nread, num_bytes);
+      output_ptr += nread;
+      num_bytes -= nread;
+    }
+  } else {
+    char* output_ptr = static_cast<char*>(output);
+    while (num_bytes > 0) {
+      int r = (++i) + reinterpret_cast<int>(output_ptr);
+      while (r >= 255) {
+        r = r + ( r >> 8);
+      }
+      *output_ptr++ = static_cast<char>(r);
+      num_bytes--;
+    }
   }
 }
 
 }  // namespace
 
 namespace base {
 
 // NOTE: This function must be cryptographically secure. http://crbug.com/140076
 uint64 RandUint64() {
   uint64 result;
   GetRandomBytes(&result, sizeof(result));
   return result;
 }
 
 void RandBytes(void* output, size_t output_length) {
   GetRandomBytes(output, output_length);
 }
 
 }  // namespace base