Use MakeWeak() to clean up function pointers in NativeHandler.

chrome/renderer/extensions/native_handler.h

Index: chrome/renderer/extensions/native_handler.h
diff --git a/chrome/renderer/extensions/native_handler.h b/chrome/renderer/extensions/native_handler.h
index f9eb4fe0e40ccfc3bb52812f0db65d7f9726d5e1..1de13ba6ea35b02af11bd1b20d5b7e55b37e510c 100644
--- a/chrome/renderer/extensions/native_handler.h
+++ b/chrome/renderer/extensions/native_handler.h
@@ -6,11 +6,9 @@
 #define CHROME_RENDERER_EXTENSIONS_NATIVE_HANDLER_H_
 
 #include "base/bind.h"
-#include "base/memory/linked_ptr.h"
 #include "v8/include/v8.h"
 
 #include <string>
-#include <vector>
 
 namespace extensions {
 
@@ -48,8 +46,9 @@ class NativeHandler {
 
  private:
   static v8::Handle<v8::Value> Router(const v8::Arguments& args);
+  static void DisposeFunction(v8::Persistent<v8::Value> object,
+                              void* parameter);
 
-  std::vector<linked_ptr<HandlerFunction> > handler_functions_;
   v8::Persistent<v8::ObjectTemplate> object_template_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeHandler);