Fix a few documentation problems

client/crashpad_info.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 12 matching lines @@
 #endif
 
 namespace {
 
 static const uint32_t kCrashpadInfoVersion = 1;
 
 }  // namespace
 
 namespace crashpad {
 
-#if CXX_LIBRARY_VERSION >= 2011
+#if CXX_LIBRARY_VERSION >= 2011 || DOXYGEN
 // In C++11, check that CrashpadInfo has standard layout, which is what is
 // actually important.
 static_assert(std::is_standard_layout<CrashpadInfo>::value,
               "CrashpadInfo must be standard layout");
 #else
 // In C++98 (ISO 14882), section 9.5.1 says that a union cannot have a member
 // with a non-trivial ctor, copy ctor, dtor, or assignment operator. Use this
 // property to ensure that CrashpadInfo remains POD. This doesn’t work for C++11
 // because the requirements for unions have been relaxed.
 union Compile_Assert {
@@ skipping 25 matching lines @@
     : signature_(kSignature),
       size_(sizeof(*this)),
       version_(kCrashpadInfoVersion),
       padding_0_(0),
       simple_annotations_(nullptr) {
 }
 
 const uint32_t CrashpadInfo::kSignature;
 
 }  // namespace crashpad