Make a new test to enforce the sizes of all structs and enums in the C API....

ppapi/c/dev/ppb_audio_config_dev.h

 // Copyright (c) 2010 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.
 
 #ifndef PPAPI_C_DEV_PPB_AUDIO_CONFIG_DEV_H_
 #define PPAPI_C_DEV_PPB_AUDIO_CONFIG_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_AUDIO_CONFIG_DEV_INTERFACE "PPB_AudioConfig(Dev);0.3"
 
 enum {
   PP_AUDIOMINSAMPLEFRAMECOUNT = 64,
   PP_AUDIOMAXSAMPLEFRAMECOUNT = 32768
 };
 
 typedef enum {
   PP_AUDIOSAMPLERATE_NONE = 0,
   PP_AUDIOSAMPLERATE_44100 = 44100,
   PP_AUDIOSAMPLERATE_48000 = 48000
 } PP_AudioSampleRate_Dev;
+PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_AudioSampleRate_Dev, 4);
 
 /**
  * Audio configuration. This base configuration interface supports only stereo
  * 16bit output. This class is not mutable, therefore it is okay to access
  * instances from different threads.
  */
 struct PPB_AudioConfig_Dev {
   /**
    * Create a 16 bit stereo config with the given sample rate. We guarantee
    * that PP_AUDIOSAMPLERATE_44100 and PP_AUDIOSAMPLERATE_48000 sample rates
@@ skipping 50 matching lines @@
 
   /**
    * Returns the sample frame count for the given AudioConfig resource. If the
    * resource is invalid, this will return 0. See RecommendSampleFrameCount for
    * more on sample frame counts.
    */
   uint32_t (*GetSampleFrameCount)(PP_Resource config);
 };
 
 #endif  // PPAPI_C_DEV_PPB_AUDIO_CONFIG_DEV_H_