V8ValueConverter for the activity logger that does not invoke interceptors and

content/public/renderer/v8_value_converter.h

Index: content/public/renderer/v8_value_converter.h
diff --git a/content/public/renderer/v8_value_converter.h b/content/public/renderer/v8_value_converter.h
index b71b32dae3ab6563f5040485fcd9bc8b8d340364..7c43a172bff341d3267221103c0596d5eb6af52f 100644
--- a/content/public/renderer/v8_value_converter.h
+++ b/content/public/renderer/v8_value_converter.h
@@ -24,7 +24,20 @@ namespace content {
 // ArrayBufferView subclasses (Uint8Array, etc.).
 class CONTENT_EXPORT V8ValueConverter {
  public:
-  static V8ValueConverter* create();
+  // Extends the default behaviour of V8ValueConverter.
+  class CONTENT_EXPORT Strategy {
+   public:
+    // If false is returned, V8ValueConverter proceeds with the default
+    // behavior.
+    virtual bool FromV8Object(v8::Handle<v8::Object> value,
+                              base::Value** out) const = 0;
+    // If false is returned, V8ValueConverter proceeds with the default
+    // behavior.
+    virtual bool FromV8Array(v8::Handle<v8::Array> value,
+                             base::Value** out) const = 0;
+  };
+
+ static V8ValueConverter* create();
 
   virtual ~V8ValueConverter() {}
 
@@ -52,6 +65,9 @@ class CONTENT_EXPORT V8ValueConverter {
   // converting arguments to extension APIs.
   virtual void SetStripNullFromObjects(bool val) = 0;
 
+  // Extend default behavior of V8ValueConverter.
+  virtual void SetStrategy(Strategy* strategy) = 0;
+
   // Converts a base::Value to a v8::Value.
   //
   // Unsupported types are replaced with null.  If an array or object throws