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diff --git a/chromium/extensions/renderer/activity_log_converter_strategy.h b/chromium/extensions/renderer/activity_log_converter_strategy.h
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+++ b/chromium/extensions/renderer/activity_log_converter_strategy.h
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+// Copyright 2014 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 EXTENSIONS_RENDERER_ACTIVITY_LOG_CONVERTER_STRATEGY_H_
+#define EXTENSIONS_RENDERER_ACTIVITY_LOG_CONVERTER_STRATEGY_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "content/public/child/v8_value_converter.h"
+#include "v8/include/v8.h"
+
+namespace extensions {
+
+// This class is used by activity logger and extends behavior of
+// V8ValueConverter. It overwrites conversion of V8 arrays and objects.  When
+// converting arrays and objects, we must not invoke any JS code which may
+// result in triggering activity logger. In such case, the log entries will be
+// generated due to V8 object conversion rather than extension activity.
+class ActivityLogConverterStrategy
+    : public content::V8ValueConverter::Strategy {
+ public:
+  typedef content::V8ValueConverter::Strategy::FromV8ValueCallback
+      FromV8ValueCallback;
+
+  ActivityLogConverterStrategy();
+  ~ActivityLogConverterStrategy() override;
+
+  // content::V8ValueConverter::Strategy implementation.
+  bool FromV8Object(v8::Local<v8::Object> value,
+                    base::Value** out,
+                    v8::Isolate* isolate,
+                    const FromV8ValueCallback& callback) const override;
+  bool FromV8Array(v8::Local<v8::Array> value,
+                   base::Value** out,
+                   v8::Isolate* isolate,
+                   const FromV8ValueCallback& callback) const override;
+
+ private:
+  bool FromV8Internal(v8::Local<v8::Object> value,
+                      base::Value** out,
+                      v8::Isolate* isolate,
+                      const FromV8ValueCallback& callback) const;
+
+  DISALLOW_COPY_AND_ASSIGN(ActivityLogConverterStrategy);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_RENDERER_ACTIVITY_LOG_CONVERTER_STRATEGY_H_