[Linux] Add field trial tuples to breakpad crash reports.

chrome/common/child_process_logging.h

 // Copyright (c) 2012 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_COMMON_CHILD_PROCESS_LOGGING_H_
 #define CHROME_COMMON_CHILD_PROCESS_LOGGING_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 44 matching lines @@
 extern char g_client_id[];
 extern char g_extension_ids[];
 extern char g_gpu_vendor_id[];
 extern char g_gpu_device_id[];
 extern char g_gpu_driver_ver[];
 extern char g_gpu_ps_ver[];
 extern char g_gpu_vs_ver[];
 extern char g_num_extensions[];
 extern char g_num_switches[];
 extern char g_num_views[];
+extern char g_num_variations[];
 extern char g_printer_info[];
 extern char g_switches[];
+extern char g_variation_chunks[];
 
 // Assume IDs are 32 bytes long.
 static const size_t kExtensionLen = 32;
 
 // Assume command line switches are less than 64 chars.
 static const size_t kSwitchLen = 64;
 
 // Assume printer info strings are less than 64 chars.
 static const size_t kPrinterInfoStrLen = 64;
 #endif
@@ skipping 83 matching lines @@
 
 extern const int kMaxNumCrashURLChunks;
 extern const int kMaxNumURLChunkValueLength;
 extern const char *kUrlChunkFormatStr;
 
 }  // namespace child_process_logging
 
 #endif  // defined(OS_MACOSX)
 
 #endif  // CHROME_COMMON_CHILD_PROCESS_LOGGING_H_