include boringssl headers from third_party explicitly

chromecast/media/base/decrypt_context_impl_clearkey.cc

Index: chromecast/media/base/decrypt_context_impl_clearkey.cc
diff --git a/chromecast/media/base/decrypt_context_impl_clearkey.cc b/chromecast/media/base/decrypt_context_impl_clearkey.cc
index c4539cbe44afe4c0c000d73416aac19c0152bb2e..d65f56f1ceac5d900c526c8866e21a540b3af6aa 100644
--- a/chromecast/media/base/decrypt_context_impl_clearkey.cc
+++ b/chromecast/media/base/decrypt_context_impl_clearkey.cc
@@ -4,7 +4,6 @@
 
 #include "chromecast/media/base/decrypt_context_impl_clearkey.h"
 
-#include <openssl/aes.h>
 #include <string.h>
 
 #include <memory>
@@ -15,6 +14,7 @@
 #include "chromecast/public/media/cast_decoder_buffer.h"
 #include "chromecast/public/media/cast_decrypt_config.h"
 #include "crypto/symmetric_key.h"
+#include "third_party/boringssl/src/include/openssl/aes.h"
 
 namespace chromecast {
 namespace media {