EME: Specify the correct size for PSSH boxes in tests

media/cdm/cenc_utils_unittest.cc

 // Copyright 2015 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 "media/cdm/cenc_utils.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <limits>
+
 #include "base/logging.h"
 #include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 const uint8_t kKey1Data[] = {
     0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03,
     0x7E, 0x57, 0x1D, 0x03, 0x7E, 0x57, 0x1D, 0x03
 };
@@ skipping 27 matching lines @@
 
  protected:
   // Initialize the start of the 'pssh' box (up to key_count)
   void InitializePSSHBox(std::vector<uint8_t>* box,
                          uint8_t size,
                          uint8_t version) {
     DCHECK(box->size() == 0);
 
     box->reserve(size);
     // Add size.
+    DCHECK(size < std::numeric_limits<uint8_t>::max());
     box->push_back(0);
     box->push_back(0);
     box->push_back(0);
     box->push_back(size);
     // Add 'pssh'.
     box->push_back('p');
     box->push_back('s');
     box->push_back('s');
     box->push_back('h');
     // Add version.
@@ skipping 480 matching lines @@
   EXPECT_FALSE(ValidatePsshInput(boxes));
 
   // Repeat with |non_pssh_box| first.
   boxes.clear();
   boxes.insert(boxes.end(), non_pssh_box.begin(), non_pssh_box.end());
   boxes.insert(boxes.end(), pssh_box.begin(), pssh_box.end());
   EXPECT_FALSE(ValidatePsshInput(boxes));
 }
 
 }  // namespace media