Fix sandbox IPC shared memory leak.

sandbox/win/src/sharedmem_ipc_server.cc

 // 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.
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "sandbox/win/src/sharedmem_ipc_server.h"
 #include "sandbox/win/src/sharedmem_ipc_client.h"
 #include "sandbox/win/src/sandbox.h"
@@ skipping 41 matching lines @@
     return;
   }
   // Free the IPC signal events.
   ServerContexts::iterator it;
   for (it = server_contexts_.begin(); it != server_contexts_.end(); ++it) {
     ServerControl* context = (*it);
     ::CloseHandle(context->ping_event);
     ::CloseHandle(context->pong_event);
     delete context;
   }
+
+  if (client_control_)
+    ::UnmapViewOfFile(client_control_);
 }
 
 bool SharedMemIPCServer::Init(void* shared_mem, uint32 shared_size,
                               uint32 channel_size) {
   // The shared memory needs to be at least as big as a channel.
   if (shared_size < channel_size) {
     return false;
   }
   // The channel size should be aligned.
   if (0 != (channel_size % 32)) {
@@ skipping 339 matching lines @@
   }
   *server_pong = ::CreateEventW(NULL, FALSE, FALSE, NULL);
   if (!::DuplicateHandle(::GetCurrentProcess(), *server_pong, target_process_,
                          client_pong, kDesiredAccess, FALSE, 0)) {
     return false;
   }
   return true;
 }
 
 }  // namespace sandbox