[Extensions Bindings] Remove ScriptContext::DispatchEvent

extensions/renderer/script_context.h

Index: extensions/renderer/script_context.h
diff --git a/extensions/renderer/script_context.h b/extensions/renderer/script_context.h
index c53626ba60cead363bf11eee331ac0d757b8b8c2..43b511478070024808a6e7bdb83dbf349d140b6a 100644
--- a/extensions/renderer/script_context.h
+++ b/extensions/renderer/script_context.h
@@ -129,8 +129,6 @@ class ScriptContext : public RequestSender::Source {
       v8::Local<v8::Value> argv[],
       const ScriptInjectionCallback::CompleteCallback& callback);
 
-  void DispatchEvent(const char* event_name, v8::Local<v8::Array> args) const;
-
   // Returns the availability of the API |api_name|.
   Feature::Availability GetAvailability(const std::string& api_name);
   // Returns the availability of the API |api_name|.