Revert 191173 "Check in a custom-built import library for user32..."

trunk/src/chrome/app/delay_load_hook_win.cc

-// Copyright (c) 2013 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 "chrome/app/delay_load_hook_win.h"
-
-#if defined(_WIN32_WINNT_WIN8) && _MSC_VER < 1700
-// The Windows 8 SDK defines FACILITY_VISUALCPP in winerror.h, and in
-// delayimp.h previous to VS2012.
-#undef FACILITY_VISUALCPP
-#endif
-#include <DelayIMP.h>
-
-#include "base/logging.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
-
-// So long as these symbols are supplied to the final binary through an
-// object file (as opposed to indirectly through a library), these pointers
-// will override the CRT's symbols and direct the notifications to our hook.
-// Alternatively referencing the ChromeDelayLoadHook function somehow will
-// cause this declaration of these variables to take preference to the delay
-// load runtime's defaults (in delayimp.lib).
-PfnDliHook __pfnDliNotifyHook2 = ChromeDelayLoadHook;
-PfnDliHook __pfnDliFailureHook2 = ChromeDelayLoadHook;
-
-
-namespace {
-
-FARPROC OnPreLoadLibrary(DelayLoadInfo* info) {
-  // If the DLL name ends with "-delay.dll", this call is about one of our
-  // custom import libraries. In this case we need to snip the suffix off,
-  // and bind to the real DLL.
-  std::string dll_name(info->szDll);
-  const char kDelaySuffix[] = "-delay.dll";
-  if (EndsWith(dll_name, kDelaySuffix, false)) {
-    // Trim the "-delay.dll" suffix from the string.
-    dll_name.resize(dll_name.length() - (sizeof(kDelaySuffix) - 1));
-    dll_name.append(".dll");
-
-    return reinterpret_cast<FARPROC>(::LoadLibraryA(dll_name.c_str()));
-  }
-
-  return NULL;
-}
-
-}  // namespace
-
-// This function is a delay load notification hook. It is invoked by the
-// delay load support in the visual studio runtime.
-// See http://msdn.microsoft.com/en-us/library/z9h1h6ty(v=vs.100).aspx for
-// details.
-FARPROC WINAPI ChromeDelayLoadHook(unsigned reason, DelayLoadInfo* info) {
-  switch (reason) {
-    case dliNoteStartProcessing:
-    case dliNoteEndProcessing:
-      // Nothing to do here.
-      break;
-
-    case dliNotePreLoadLibrary:
-      return OnPreLoadLibrary(info);
-      break;
-
-    case dliNotePreGetProcAddress:
-      // Nothing to do here.
-      break;
-
-    case dliFailLoadLib:
-    case dliFailGetProc:
-      // Returning NULL from error notifications will cause the delay load
-      // runtime to raise a VcppException structured exception, that some code
-      // might want to handle.
-      return NULL;
-      break;
-
-    default:
-      NOTREACHED() << "Impossible delay load notification.";
-      break;
-  }
-
-  // Returning NULL causes the delay load machinery to perform default
-  // processing for this notification.
-  return NULL;
-}