Add GPU fingerprint information to breakpad microdumps.

src/client/linux/handler/microdump_extra_info.h

-// Copyright (c) 2007, Google Inc.
+// Copyright 2015 Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#include "common/simple_string_dictionary.h"
+#ifndef CLIENT_LINUX_HANDLER_MICRODUMP_EXTRA_INFO_H_
+#define CLIENT_LINUX_HANDLER_MICRODUMP_EXTRA_INFO_H_
 
 namespace google_breakpad {
 
-namespace {
+struct MicrodumpExtraInfo {
+  // Strings pointed to by this struct are not copied, and are
+  // expected to remain valid for the lifetime of the process.
+  const char* build_fingerprint;
+  const char* product_info;
+  const char* gpu_fingerprint;
 
-// 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 Entry remains POD.
-union Compile_Assert {
-  NonAllocatingMap<1, 1, 1>::Entry Compile_Assert__entry_must_be_pod;
+  MicrodumpExtraInfo()
+      : build_fingerprint(NULL), product_info(NULL), gpu_fingerprint(NULL) {}
 };
 
 }
 
-}  // namespace google_breakpad
+#endif  // CLIENT_LINUX_HANDLER_MICRODUMP_EXTRA_INFO_H_