Add PlayerTracker and BrowserCdm interfaces.

media/base/browser_cdm_factory.h

Index: media/base/browser_cdm_factory.h
diff --git a/media/base/cdm_factory.h b/media/base/browser_cdm_factory.h
similarity index 73%
rename from media/base/cdm_factory.h
rename to media/base/browser_cdm_factory.h
index ccdefa72fd38fda93e70c07b47d3594eede37c30..4e86c8ba59e4728eafef82018aa87057fbd5a24f 100644
--- a/media/base/cdm_factory.h
+++ b/media/base/browser_cdm_factory.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MEDIA_BASE_CDM_FACTORY_H_
-#define MEDIA_BASE_CDM_FACTORY_H_
+#ifndef MEDIA_BASE_BROWSER_CDM_FACTORY_H_
+#define MEDIA_BASE_BROWSER_CDM_FACTORY_H_
 
 #include <string>
 
@@ -13,9 +13,12 @@
 
 namespace media {
 
-// Creates a CDM for |key_system|. Returns NULL if the CDM cannot be created.
+class BrowserCdm;
+
+// Creates a BrowserCdm for |key_system|. Returns NULL if the CDM cannot be
+// created.
 // TODO(xhwang): Add ifdef for IPC based CDM.
-scoped_ptr<MediaKeys> MEDIA_EXPORT
+scoped_ptr<BrowserCdm> MEDIA_EXPORT
     CreateBrowserCdm(const std::string& key_system,
                      const SessionCreatedCB& session_created_cb,
                      const SessionMessageCB& session_message_cb,
@@ -25,4 +28,4 @@ scoped_ptr<MediaKeys> MEDIA_EXPORT
 
 }  // namespace media
 
-#endif  // MEDIA_BASE_CDM_FACTORY_H_
+#endif  // MEDIA_BASE_BROWSER_CDM_FACTORY_H_