Use BoringSSL in the implementation of ClearKey for Chromecast.
(Previously, this was used only with the "Chrome" branding).

BUG= 488572

R=gunsch@chromium.org

Review URL: https://codereview.chromium.org/1130893008

Cr-Commit-Position: refs/heads/master@{#330156}
diff --git a/chromecast/media/media.gyp b/chromecast/media/media.gyp
index 20b1dc0c..125e278 100644
--- a/chromecast/media/media.gyp
+++ b/chromecast/media/media.gyp
@@ -195,17 +195,7 @@
         '../../base/base.gyp:base',
         '../../crypto/crypto.gyp:crypto',
         '../../media/media.gyp:media',
-      ],
-      'conditions': [
-        ['chromecast_branding=="Chrome"', {
-          'dependencies': [
-            '../internal/cast_system.gyp:openssl',
-          ],
-        }, {
-          'dependencies': [
-            '../../third_party/boringssl/boringssl.gyp:boringssl',
-          ],
-        }],
+        '../../third_party/boringssl/boringssl.gyp:boringssl',
       ],
       'sources': [
         'cma/pipeline/audio_pipeline.cc',