Move MediaDrmBridge provision communication to native side.

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 8e62770d3f1ae4ca6082f692102bd7d3747f293a..ddd7236b5e64769162be651bfde6919abe083de5 100644
--- a/content/browser/media/android/media_drm_credential_manager.cc
+++ b/content/browser/media/android/media_drm_credential_manager.cc
@@ -13,6 +13,7 @@
 #include "base/thread_task_runner_handle.h"
 #include "jni/MediaDrmCredentialManager_jni.h"
 #include "media/base/android/media_drm_bridge.h"
+#include "media/base/android/provision_fetcher.h"
 #include "url/gurl.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
@@ -91,8 +92,11 @@ void MediaDrmCredentialManager::OnResetCredentialsCompleted(
 // TODO(ddorwin): The key system should be passed in. http://crbug.com/459400
 bool MediaDrmCredentialManager::ResetCredentialsInternal(
     SecurityLevel security_level) {
-  media_drm_bridge_ =
-      media::MediaDrmBridge::CreateWithoutSessionSupport(kWidevineKeySystem);
+  scoped_ptr<media::ProvisionFetcher> provision_fetcher =
+      media::ProvisionFetcher::GetFactory()->CreateFetcher();
+
+  media_drm_bridge_ = media::MediaDrmBridge::CreateWithoutSessionSupport(
+      kWidevineKeySystem, provision_fetcher.Pass());

[xhwang, 2015/11/02 20:37:04]

Can we create the ProvisionFetcher directly in MDB? Then we can create it only
when we need it.

[Tima Vaisburd, 2015/11/05 02:24:07]

Done for this path, but not for the other.

   if (!media_drm_bridge_)
     return false;