[content/browser/media] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

content/browser/media/android/media_drm_credential_manager.cc

Index: content/browser/media/android/media_drm_credential_manager.cc
diff --git a/content/browser/media/android/media_drm_credential_manager.cc b/content/browser/media/android/media_drm_credential_manager.cc
index e419b04f4344869aebcc1ed4dc8eb8ac55532c68..50d66538db8b051d494f4b488a94ab6bdce7f7f3 100644
--- a/content/browser/media/android/media_drm_credential_manager.cc
+++ b/content/browser/media/android/media_drm_credential_manager.cc
@@ -9,7 +9,8 @@
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "jni/MediaDrmCredentialManager_jni.h"
 #include "media/base/android/media_drm_bridge.h"
 #include "url/gurl.h"
@@ -101,7 +102,7 @@ bool MediaDrmCredentialManager::ResetCredentialsInternal(
 
   if (!media_drm_bridge_->SetSecurityLevel(security_level)) {
     // No need to reset credentials for unsupported |security_level|.
-    base::MessageLoopProxy::current()->PostTask(
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(reset_credentials_cb, true));
     return true;
   }