Convert CreateCdmBuffer() to use size_t for |capacity|

media/mojo/common/mojo_shared_buffer_video_frame_unittest.cc

 // Copyright 2016 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/mojo/common/mojo_shared_buffer_video_frame.h"
 
 #include <stddef.h>
 #include <stdint.h>
+
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "mojo/public/cpp/system/buffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace media {
 
 namespace {
 
 void CompareDestructionCallbackValues(
     mojo::SharedBufferHandle expected_handle,
-    uint32_t expected_handle_size,
+    size_t expected_handle_size,
     bool* callback_called,
     mojo::ScopedSharedBufferHandle actual_handle,
-    uint32_t actual_handle_size) {
+    size_t actual_handle_size) {
   // Compare expected vs actual. Ownership of the memory is transferred with
   // |actual_handle|, thus it is a ScopedSharedBufferHandle.
   EXPECT_EQ(expected_handle, actual_handle.get());
   EXPECT_EQ(expected_handle_size, actual_handle_size);
   *callback_called = true;
 }
 
 }  // namespace
 
 TEST(MojoSharedBufferVideoFrameTest, CreateFrameWithSharedMemory) {
@@ skipping 131 matching lines @@
                                               original_handle, requested_size,
                                               &callback_called));
   EXPECT_FALSE(callback_called);
 
   // Force destruction of |frame|.
   frame = nullptr;
   EXPECT_TRUE(callback_called);
 }
 
 }  // namespace media