ppapi: Support up to 32 subsamples in PP_EncryptedBlockInfo.

ppapi/c/private/pp_content_decryptor.h

Index: ppapi/c/private/pp_content_decryptor.h
diff --git a/ppapi/c/private/pp_content_decryptor.h b/ppapi/c/private/pp_content_decryptor.h
index cc6f0796fcd60c5aa2c0fc6e4285ced32421e872..3ccc3e70a3f02a8f844b96eddd9b8dd0a7a0f502 100644
--- a/ppapi/c/private/pp_content_decryptor.h
+++ b/ppapi/c/private/pp_content_decryptor.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From private/pp_content_decryptor.idl modified Wed Sep 16 16:45:25 2015. */
+/* From private/pp_content_decryptor.idl modified Mon Oct 19 13:00:24 2015. */
 
 #ifndef PPAPI_C_PRIVATE_PP_CONTENT_DECRYPTOR_H_
 #define PPAPI_C_PRIVATE_PP_CONTENT_DECRYPTOR_H_
@@ -120,11 +120,16 @@ struct PP_EncryptedBlockInfo {
   uint32_t iv_size;
   /**
    * Subsample information of the block to be decrypted.
+   *
+   * TODO(xhwang): We need to have a fixed size of |subsamples| here. Choose 32
+   * because it is sufficient for almost all real life scenarios. Note that in
+   * theory the number of subsamples could be larger than 32. If that happens,
+   * playback will fail.
    */
-  struct PP_DecryptSubsampleDescription subsamples[16];
+  struct PP_DecryptSubsampleDescription subsamples[32];
   uint32_t num_subsamples;
 };
-PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_EncryptedBlockInfo, 240);
+PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_EncryptedBlockInfo, 368);
 /**
  * @}
  */