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diff --git a/chrome/common/child_process_logging.h b/chrome/common/child_process_logging.h
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+// 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_
+
+#include <set>
+#include <string>
+
+#include "base/basictypes.h"
+#include "chrome/common/gpu_info.h"
+#include "googleurl/src/gurl.h"
+
+#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 {
+
+// 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::set<std::string>& extension_ids);
+
+// Sets the data on the gpu to send along with crash reports.
+void SetGpuInfo(const GPUInfo& gpu_info);
+
+// 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());
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedActiveURLSetter);
+};
+
+}  // namespace child_process_logging
+
+#if defined(OS_MACOSX) && __OBJC__
+
+@class NSString;
+
+typedef void (*SetCrashKeyValueFuncPtr)(NSString*, NSString*);
+typedef void (*ClearCrashKeyValueFuncPtr)(NSString*);
+
+namespace child_process_logging {
+void SetCrashKeyFunctions(SetCrashKeyValueFuncPtr set_key_func,
+                          ClearCrashKeyValueFuncPtr clear_key_func);
+void SetActiveURLImpl(const GURL& url,
+                      SetCrashKeyValueFuncPtr set_key_func,
+                      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_