Mojo C++ bindings: remove unnecessary getters/params of AssociatedGroup.

mojo/public/cpp/bindings/binding.h

 // Copyright 2014 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.
 
 #ifndef MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_
 
 #include <string>
 #include <utility>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "mojo/public/cpp/bindings/connection_error_callback.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/interface_ptr_info.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/lib/binding_state.h"
 #include "mojo/public/cpp/bindings/raw_ptr_impl_ref_traits.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 
-class AssociatedGroup;
 class MessageReceiver;
 
 // Represents the binding of an interface implementation to a message pipe.
 // When the |Binding| object is destroyed, the binding between the message pipe
 // and the interface is torn down and the message pipe is closed, leaving the
 // interface implementation in an unbound state.
 //
 // Example:
 //
 //   #include "foo.mojom.h"
@@ skipping 213 matching lines @@
   // Indicates whether the binding has been completed (i.e., whether a message
   // pipe has been bound to the implementation).
   bool is_bound() const { return internal_state_.is_bound(); }
 
   // Returns the value of the handle currently bound to this Binding which can
   // be used to make explicit Wait/WaitMany calls. Requires that the Binding be
   // bound. Ownership of the handle is retained by the Binding, it is not
   // transferred to the caller.
   MessagePipeHandle handle() const { return internal_state_.handle(); }
 
-  // Returns the associated group that this object belongs to. Returns null if:
-  //   - this object is not bound; or
-  //   - the interface doesn't have methods to pass associated interface
-  //     pointers or requests.
-  AssociatedGroup* associated_group() {
-    return internal_state_.associated_group();
-  }
-
   // Sends a no-op message on the underlying message pipe and runs the current
   // message loop until its response is received. This can be used in tests to
   // verify that no message was sent on a message pipe in response to some
   // stimulus.
   void FlushForTesting() { internal_state_.FlushForTesting(); }
 
   // Exposed for testing, should not generally be used.
   void EnableTestingMode() { internal_state_.EnableTestingMode(); }
 
  private:
   internal::BindingState<Interface, ImplRefTraits> internal_state_;
 
   DISALLOW_COPY_AND_ASSIGN(Binding);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_BINDING_H_