diff --git a/webrtc/base/BUILD.gn b/webrtc/base/BUILD.gn
index d0f4e77214..156969c953 100644
--- a/webrtc/base/BUILD.gn
+++ b/webrtc/base/BUILD.gn
@@ -471,7 +471,6 @@ rtc_static_library("rtc_base") {
       "referencecountedsingletonfactory.h",
       "rollingaccumulator.h",
       "scopedptrcollection.h",
-      "sec_buffer.h",
       "sslconfig.h",
       "sslroots.h",
       "testbase64.h",
diff --git a/webrtc/base/base.gyp b/webrtc/base/base.gyp
index 101d3eccb6..924de2a55f 100644
--- a/webrtc/base/base.gyp
+++ b/webrtc/base/base.gyp
@@ -432,7 +432,6 @@
             'referencecountedsingletonfactory.h',
             'rollingaccumulator.h',
             'scopedptrcollection.h',
-            'sec_buffer.h',
             'sslconfig.h',
             'sslroots.h',
             'testbase64.h',
diff --git a/webrtc/base/sec_buffer.h b/webrtc/base/sec_buffer.h
deleted file mode 100644
index 3ef720a9b2..0000000000
--- a/webrtc/base/sec_buffer.h
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// @file Contains utility classes that make it easier to use SecBuffers
-
-#ifndef WEBRTC_BASE_SEC_BUFFER_H__
-#define WEBRTC_BASE_SEC_BUFFER_H__
-
-namespace rtc {
-
-// A base class for CSecBuffer<T>. Contains
-// all implementation that does not require
-// template arguments.
-class CSecBufferBase : public SecBuffer {
- public:
-  CSecBufferBase() {
-    Clear();
-  }
-
-  // Uses the SSPI to free a pointer, must be
-  // used for buffers returned from SSPI APIs.
-  static void FreeSSPI(void *ptr) {
-    if ( ptr ) {
-      SECURITY_STATUS status;
-      status = ::FreeContextBuffer(ptr);
-      ASSERT(SEC_E_OK == status); // "Freeing context buffer"
-    }
-  }
-
-  // Deletes a buffer with operator delete
-  static void FreeDelete(void *ptr) {
-    delete [] reinterpret_cast<char*>(ptr);
-  }
-
-  // A noop delete, for buffers over other
-  // people's memory
-  static void FreeNone(void *ptr) {
-  }
-
- protected:
-  // Clears the buffer to EMPTY & NULL
-  void Clear() {
-    this->BufferType = SECBUFFER_EMPTY;
-    this->cbBuffer = 0;
-    this->pvBuffer = NULL;
-  }
-};
-
-// Wrapper class for SecBuffer to take care
-// of initialization and destruction.
-template <void (*pfnFreeBuffer)(void *ptr)>
-class CSecBuffer: public CSecBufferBase {
- public:
-  // Initializes buffer to empty & NULL
-  CSecBuffer() {
-  }
-
-  // Frees any allocated memory
-  ~CSecBuffer() {
-    Release();
-  }
-
-  // Frees the buffer appropriately, and re-nulls
-  void Release() {
-    pfnFreeBuffer(this->pvBuffer);
-    Clear();
-  }
-
-  // This class must not extend the size of SecBuffer, since we use arrays of
-  // CSecBuffer in CSecBufferBundle below.
-  static_assert(sizeof(CSecBuffer<pfnFreeBuffer>) == sizeof(SecBuffer), "");
-};
-
-// Contains all generic implementation for the
-// SecBufferBundle class
-class SecBufferBundleBase {
- public:
-};
-
-// A template class that bundles a SecBufferDesc with
-// one or more SecBuffers for convenience. Can take
-// care of deallocating buffers appropriately, as indicated
-// by pfnFreeBuffer function.
-// By default does no deallocation.
-template <int num_buffers,
-          void (*pfnFreeBuffer)(void *ptr) = CSecBufferBase::FreeNone>
-class CSecBufferBundle : public SecBufferBundleBase {
- public:
-  // Constructs a security buffer bundle with num_buffers
-  // buffers, all of which are empty and nulled.
-  CSecBufferBundle() {
-    desc_.ulVersion = SECBUFFER_VERSION;
-    desc_.cBuffers = num_buffers;
-    desc_.pBuffers = buffers_;
-  }
-
-  // Frees all currently used buffers.
-  ~CSecBufferBundle() {
-    Release();
-  }
-
-  // Accessor for the descriptor
-  PSecBufferDesc desc() {
-    return &desc_;
-  }
-
-  // Accessor for the descriptor
-  PSecBufferDesc desc() const {
-    return &desc_;
-  }
-
-  // returns the i-th security buffer
-  SecBuffer &operator[] (size_t num) {
-    ASSERT(num < num_buffers); // "Buffer index out of bounds"
-    return buffers_[num];
-  }
-
-  // returns the i-th security buffer
-  const SecBuffer &operator[] (size_t num) const {
-    ASSERT(num < num_buffers); // "Buffer index out of bounds"
-    return buffers_[num];
-  }
-
-  // Frees all non-NULL security buffers,
-  // using the deallocation function
-  void Release() {
-    for ( size_t i = 0; i < num_buffers; ++i ) {
-      buffers_[i].Release();
-    }
-  }
-
- private:
-  // Our descriptor
-  SecBufferDesc               desc_;
-  // Our bundled buffers, each takes care of its own
-  // initialization and destruction
-  CSecBuffer<pfnFreeBuffer>   buffers_[num_buffers];
-};
-
-} // namespace rtc
-
-#endif  // WEBRTC_BASE_SEC_BUFFER_H__
diff --git a/webrtc/base/socketadapters.cc b/webrtc/base/socketadapters.cc
index e1c8a072b2..cf7ffb7b83 100644
--- a/webrtc/base/socketadapters.cc
+++ b/webrtc/base/socketadapters.cc
@@ -34,10 +34,6 @@
 #include "webrtc/base/stringencode.h"
 #include "webrtc/base/stringutils.h"
 
-#if defined(WEBRTC_WIN)
-#include "webrtc/base/sec_buffer.h"
-#endif  // WEBRTC_WIN
-
 namespace rtc {
 
 BufferedReadAdapter::BufferedReadAdapter(AsyncSocket* socket, size_t size)