Remove ScopedComPtr::QueryFrom()

base/win/scoped_comptr.h

 // Copyright (c) 2011 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 BASE_WIN_SCOPED_COMPTR_H_
 #define BASE_WIN_SCOPED_COMPTR_H_
 
 #include <objbase.h>
 #include <unknwn.h>
 
@@ skipping 98 matching lines @@
     return ptr_->QueryInterface(IID_PPV_ARGS(p));
   }
 
   // QI for times when the IID is not associated with the type.
   HRESULT CopyTo(const IID& iid, void** obj) {
     DCHECK(obj);
     DCHECK(ptr_);
     return ptr_->QueryInterface(iid, obj);
   }
 
-  // Queries |other| for the interface this object wraps and returns the
-  // error code from the other->QueryInterface operation.
-  HRESULT QueryFrom(IUnknown* object) {
-    DCHECK(object);
-    return object->QueryInterface(IID_PPV_ARGS(GetAddressOf()));
-  }
-
   // Convenience wrapper around CoCreateInstance
   HRESULT CreateInstance(const CLSID& clsid,
                          IUnknown* outer = nullptr,
                          DWORD context = CLSCTX_ALL) {
     DCHECK(!ptr_);
     HRESULT hr = ::CoCreateInstance(clsid, outer, context, *interface_id,
                                     reinterpret_cast<void**>(&ptr_));
     return hr;
   }
 
@@ skipping 141 matching lines @@
 // Helper to make IID_PPV_ARGS work with ScopedComPtr.
 template <typename T>
 void** IID_PPV_ARGS_Helper(base::win::details::ScopedComPtrRef<T> pp) throw() {
   return pp;
 }
 
 }  // namespace win
 }  // namespace base
 
 #endif  // BASE_WIN_SCOPED_COMPTR_H_