Try to unbreak mini_installer build.

chrome/installer/mini_installer/mini_string.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 CHROME_INSTALLER_MINI_INSTALLER_MINI_STRING_H_
 #define CHROME_INSTALLER_MINI_INSTALLER_MINI_STRING_H_
 
 #ifndef COMPILE_ASSERT
-// COMPILE_ASSERT macro borrowed from macros.h
+// Some bots that build mini_installer don't know static_assert.
+#if __cplusplus >= 201103L
 #define COMPILE_ASSERT(expr, msg) static_assert(expr, #msg)
+#else
+template <bool>
+struct CompileAssert {};
+#define COMPILE_ASSERT(expr, msg) \
+  typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
+#endif
 #endif
 
 namespace mini_installer {
 
 // NOTE: Do not assume that these string functions support UTF encoding.
 // This is fine for the purposes of the mini_installer, but you have
 // been warned!
 
 // Formats a sequence of |bytes| as hex.  The |str| buffer must have room for
 // at least 2*|size| + 1.
@@ skipping 115 matching lines @@
   wchar_t buffer_[kCapacity + 1];
 
  private:
   StackString(const StackString&);
   StackString& operator=(const StackString&);
 };
 
 }  // namespace mini_installer
 
 #endif  // CHROME_INSTALLER_MINI_INSTALLER_MINI_STRING_H_