[cast_channel] Make CastSocket not inherit from ApiResource

extensions/browser/api/cast_channel/cast_channel_api.h

Index: extensions/browser/api/cast_channel/cast_channel_api.h
diff --git a/extensions/browser/api/cast_channel/cast_channel_api.h b/extensions/browser/api/cast_channel/cast_channel_api.h
index c257599da0abc997db1b5bd771a95346cc2bdf88..4e615c75d5bb1fa6141a0fe7c398147e606702e3 100644
--- a/extensions/browser/api/cast_channel/cast_channel_api.h
+++ b/extensions/browser/api/cast_channel/cast_channel_api.h
@@ -12,7 +12,6 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
-#include "extensions/browser/api/api_resource_manager.h"
 #include "extensions/browser/api/async_api_function.h"
 #include "extensions/browser/api/cast_channel/cast_socket.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
@@ -34,6 +33,7 @@ struct Event;
 
 namespace api {
 namespace cast_channel {
+class CastChannelService;
 class Logger;
 }  // namespace cast_channel
 }  // namespace api
@@ -102,9 +102,6 @@ class CastChannelAsyncApiFunction : public AsyncApiFunction {
   CastChannelAsyncApiFunction();
 
  protected:
-  typedef ApiResourceManager<cast_channel::CastSocket>::ApiResourceData
-      SocketData;
-
   ~CastChannelAsyncApiFunction() override;
 
   // AsyncApiFunction:
@@ -140,8 +137,8 @@ class CastChannelAsyncApiFunction : public AsyncApiFunction {
   // Sets the function result from |channel_info|.
   void SetResultFromChannelInfo(const cast_channel::ChannelInfo& channel_info);
 
-  // The collection of CastSocket API resources.
-  scoped_refptr<SocketData> sockets_;
+  // Manages creating and removing cast sockets.
+  api::cast_channel::CastChannelService* cast_channel_service_;
 };
 
 class CastChannelOpenFunction : public CastChannelAsyncApiFunction {