Adds MediaClientAndroid to support embedder/MediaDrmBridge interaction.

chromecast/browser/cast_browser_main_parts.cc

Index: chromecast/browser/cast_browser_main_parts.cc
diff --git a/chromecast/browser/cast_browser_main_parts.cc b/chromecast/browser/cast_browser_main_parts.cc
index cdaaf0b078f534ee8f325529ee9c7cdb44b4de2e..7378b2549827c86c5a52b85efcfacb95216a4f07 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -37,6 +37,8 @@
 
 #if defined(OS_ANDROID)
 #include "chromecast/crash/android/crash_handler.h"
+#include "chromecast/media/cdm/playready_drm_delegate_android.h"
+#include "components/cdm/browser/widevine_drm_delegate_android.h"
 #include "components/crash/browser/crash_dump_manager_android.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #else
@@ -261,7 +263,12 @@ void CastBrowserMainParts::PreMainMessageLoopRun() {
   cast_browser_process_->SetPrefService(
       PrefServiceHelper::CreatePrefService(pref_registry.get()));
 
-#if !defined(OS_ANDROID)
+#if defined(OS_ANDROID)
+#if defined(PLAYREADY_CDM_AVAILABLE)
+  media::PlayreadyDrmDelegateAndroid::Install();
+#endif
+  cdm::WidevineDrmDelegateAndroid::Install();
+#else
   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
   if (cmd_line->HasSwitch(switches::kEnableCmaMediaPipeline))
     ::media::SetBrowserCdmFactory(new media::CastBrowserCdmFactory);