Make crash reporting client_id accessible through child_process_logging.

chrome/common/child_process_logging.h

 // Copyright (c) 2010 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_
 #pragma once
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "googleurl/src/gurl.h"
 
 class GPUInfo;
 
 #if defined(OS_WIN)
 // The maximum number of active extensions we will report.
 // Also used in chrome/app, but we define it here to avoid a common->app
 // dependency.
 static const int kMaxReportedActiveExtensions = 10;
 #endif
 
 namespace child_process_logging {
 
+#if defined(OS_LINUX)
+// These are declared here so the crash reporter can access them directly in
+// compromised context without going through the standard library.
+extern char g_active_url[];
+extern char g_client_id[];
+#endif
+
 // Sets the URL that is logged if the child process crashes. Use GURL() to clear
 // the URL.
 void SetActiveURL(const GURL& url);
 
 // Sets the Client ID that is used as GUID if a Chrome process crashes.
 void SetClientId(const std::string& client_id);
 
+// Gets the Client ID to be used as GUID for crash reporting. Returns the client
+// id in |client_id| if it's known, an empty string otherwise.
+std::string GetClientId();
+
 // Sets the list of "active" extensions in this process. We overload "active" to
 // mean different things depending on the process type:
 // - browser: all enabled extensions
 // - renderer: the unique set of extension ids from all content scripts
 // - extension: the id of each extension running in this process (there can be
 //   multiple because of process collapsing).
 void SetActiveExtensions(const std::set<std::string>& extension_ids);
 
 // Sets the data on the gpu to send along with crash reports.
 void SetGpuInfo(const GPUInfo& gpu_info);
@@ skipping 31 matching lines @@
                       ClearCrashKeyValueFuncPtr clear_key_func);
 
 extern const int kMaxNumCrashURLChunks;
 extern const int kMaxNumURLChunkValueLength;
 extern const char *kUrlChunkFormatStr;
 }  // namespace child_process_logging
 
 #endif  // defined(OS_MACOSX) && __OBJC__
 
 #endif  // CHROME_COMMON_CHILD_PROCESS_LOGGING_H_