Adds MediaClientAndroid to support embedder/MediaDrmBridge interaction.

chromecast/media/cdm/browser_cdm_cast.cc

Index: chromecast/media/cdm/browser_cdm_cast.cc
diff --git a/chromecast/media/cdm/browser_cdm_cast.cc b/chromecast/media/cdm/browser_cdm_cast.cc
index 33c10c5d90af02991a96a72fe62fd7d71c414dac..ff922a1c03f68dcd75474852f8cb6355fc624e79 100644
--- a/chromecast/media/cdm/browser_cdm_cast.cc
+++ b/chromecast/media/cdm/browser_cdm_cast.cc
@@ -102,7 +102,7 @@ void BrowserCdmCast::OnSessionKeysChange(
 void BrowserCdmCast::SetServerCertificateHelper(
     const std::vector<uint8>& certificate_data,
     scoped_ptr<::media::SimpleCdmPromise> promise) {
-  SetServerCertificate(certificate_data.data(),
+  SetServerCertificate(&certificate_data[0],
                        certificate_data.size(),
                        promise.Pass());
 }
@@ -113,7 +113,7 @@ void BrowserCdmCast::CreateSessionAndGenerateRequestHelper(
     const std::vector<uint8>& init_data,
     scoped_ptr<::media::NewSessionCdmPromise> promise) {
   CreateSessionAndGenerateRequest(
-      session_type, init_data_type, init_data.data(), init_data.size(),
+      session_type, init_data_type, &init_data[0], init_data.size(),
       promise.Pass());
 }
 
@@ -121,7 +121,7 @@ void BrowserCdmCast::UpdateSessionHelper(
     const std::string& session_id,
     const std::vector<uint8>& response,
     scoped_ptr<::media::SimpleCdmPromise> promise) {
-  UpdateSession(session_id, response.data(), response.size(), promise.Pass());
+  UpdateSession(session_id, &response[0], response.size(), promise.Pass());
 }
 
 // A macro runs current member function on |cdm_loop_| thread.