Ok, here is a different approach at this change.

chrome/common/child_process_logging.h

 // Copyright (c) 2009 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 <vector>
+
 #include "base/basictypes.h"
 #include "googleurl/src/gurl.h"
 
 namespace child_process_logging {
 
 // 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);
 
+// 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::vector<std::string>& extension_ids);
+
 // Simple wrapper class that sets the active URL in it's constructor and clears
 // the active URL in the destructor.
 class ScopedActiveURLSetter {
  public:
   explicit ScopedActiveURLSetter(const GURL& url)  {
     SetActiveURL(url);
   }
 
   ~ScopedActiveURLSetter()  {
     SetActiveURL(GURL());
@@ skipping 20 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_