Remove unnecessary SupportsWeakPtr base from ChromotingInstance.

remoting/client/plugin/chromoting_instance.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // TODO(ajwong): We need to come up with a better description of the
 // responsibilities for each thread.
 
 #ifndef REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
 #define REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_
 
@@ skipping 53 matching lines @@
 class PepperView;
 class PepperSignalStrategy;
 class RectangleUpdateDecoder;
 
 struct ClientConfig;
 
 class ChromotingInstance :
       public ClientUserInterface,
       public protocol::ClipboardStub,
       public protocol::CursorShapeStub,
-      public pp::Instance,
-      public base::SupportsWeakPtr<ChromotingInstance> {
+      public pp::Instance {
  public:
   // Plugin API version. This should be incremented whenever the API
   // interface changes.
   static const int kApiVersion = 7;
 
   // Plugin API features. This allows orthogonal features to be supported
   // without bumping the API version.
   static const char kApiFeatures[];
 
   // Capabilities supported by the plugin that should also be supported by the
@@ skipping 165 matching lines @@
 #endif
   KeyEventMapper key_mapper_;
   PepperInputHandler input_handler_;
 
   // PIN Fetcher.
   bool use_async_pin_dialog_;
   protocol::SecretFetchedCallback secret_fetched_callback_;
 
   base::WeakPtr<PepperTokenFetcher> pepper_token_fetcher_;
 
+  // Weak reference to this instance, used for global logging and task posting.
   base::WeakPtrFactory<ChromotingInstance> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingInstance);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_PLUGIN_CHROMOTING_INSTANCE_H_