Edit precompile to eliminate headers that define 'interface'.

build/precompile.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.
 
 // Precompiled header for Chromium project on Windows, not used by
 // other build configurations. Using precompiled headers speeds the
 // build up significantly, around 1/4th on VS 2010 on an HP Z600 with 12
 // GB of memory.
 //
 // Numeric comments beside includes are the number of times they were
 // included under src/chrome/browser on 2011/8/20, which was used as a
 // baseline for deciding what to include in the PCH. It may be
 // possible to tweak the speed of the build by commenting out or
 // removing some of the less frequently used headers.
 
 #if defined(BUILD_PRECOMPILE_H_)
 #error You shouldn't include the precompiled header file more than once.
 #endif
 
 #define BUILD_PRECOMPILE_H_
 
 // The Windows header needs to come before almost all the other
 // Windows-specific headers.
 #include <Windows.h>
+#include <dwmapi.h>
+#include <shellapi.h>
+#include <wincrypt.h>  // 4
+#include <wtypes.h>  // 2
 
 // TODO(joi): Defines in atlbase.h cause conflicts; need to figure out
 // if/how this family of headers can be included in the PCH; several
 // of them are used quite frequently.
 /*
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlcom.h>
 #include <atlcrack.h>  // 2
 #include <atlctrls.h>  // 2
 #include <atlmisc.h>  // 2
 #include <atlsafe.h>  // 1
 #include <atltheme.h>  // 1
 #include <atlwin.h>  // 2
 */
 
-#include <commctrl.h>  // 2
-#include <commdlg.h>  // 3
-#include <cryptuiapi.h>  // 2
-#include <dwmapi.h>
-#include <Objbase.h>  // 2
-#include <objidl.h>  // 1
-#include <ole2.h>  // 1
-#include <oleacc.h>  // 2
-#include <oleauto.h>  // 1
-#include <oleidl.h>  // 1
-#include <propkey.h>  // 2
-#include <propvarutil.h>  // 2
-#include <pstore.h>  // 2
-#include <shellapi.h>
-#include <shlguid.h>  // 1
-//#include <shlobj.h>  TODO(joi): Caused conflicts, see if they can be resolved.
-#include <shlwapi.h>  // 1
-#include <shobjidl.h>  // 4
-#include <urlhist.h>  // 2
-#include <wincrypt.h>  // 4
-#include <wtypes.h>  // 2
+// TODO(joi): Objbase.h and other files that rely on it bring in
+// [ #define interface struct ] which can cause problems in a
+// multi-platform build like Chrome's. Tried #undef-ing it, but
+// there are currently 118 targets that break if we do this, so
+// leaving out of the precompiled header for now.
+//#include <commctrl.h>  // 2
+//#include <commdlg.h>  // 3
+//#include <cryptuiapi.h>  // 2
+//#include <Objbase.h>  // 2
+//#include <objidl.h>  // 1
+//#include <ole2.h>  // 1
+//#include <oleacc.h>  // 2
+//#include <oleauto.h>  // 1
+//#include <oleidl.h>  // 1
+//#include <propkey.h>  // 2
+//#include <propvarutil.h>  // 2
+//#include <pstore.h>  // 2
+//#include <shlguid.h>  // 1
+//#include <shlwapi.h>  // 1
+//#include <shobjidl.h>  // 4
+//#include <urlhist.h>  // 2
+
+// TODO(joi): Caused other conflicts in addition to the 'interface' issue
+// above, see if they can be resolved.
+//#include <shlobj.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>  // 4
 #include <math.h>
 #include <memory.h>  // 1
 #include <signal.h>
 #include <stdarg.h>  // 1
 #include <stddef.h>
 #include <stdio.h>
@@ skipping 19 matching lines @@
 #include <map>
 #include <numeric>  // 2
 #include <ostream>
 #include <queue>
 #include <set>
 #include <sstream>
 #include <stack>
 #include <string>
 #include <utility>
 #include <vector>