[Extensions Bindings] Add an ExceptionHandler class

extensions/renderer/bindings/api_binding_types.h

Index: extensions/renderer/bindings/api_binding_types.h
diff --git a/extensions/renderer/bindings/api_binding_types.h b/extensions/renderer/bindings/api_binding_types.h
index 3f2ee53067f8bffe3c88d005a7fcff0d993207ea..87b1b7692b3c0f5666c1464c4a219bc953436642 100644
--- a/extensions/renderer/bindings/api_binding_types.h
+++ b/extensions/renderer/bindings/api_binding_types.h
@@ -49,6 +49,10 @@ using RunJSFunctionSync =
                                          int argc,
                                          v8::Local<v8::Value>[])>;
 
+// Adds an error message to the context's console.
+using AddConsoleError =
+    base::Callback<void(v8::Local<v8::Context>, const std::string& error)>;
+
 }  // namespace binding
 }  // namespace extensions