[Extensions Bindings] Include request id in a custom callback response

chrome/renderer/resources/extensions/page_capture_custom_bindings.js

Index: chrome/renderer/resources/extensions/page_capture_custom_bindings.js
diff --git a/chrome/renderer/resources/extensions/page_capture_custom_bindings.js b/chrome/renderer/resources/extensions/page_capture_custom_bindings.js
index a6590b43c5a6230547c7fd2421f1c52e5ada4c73..f27147d7f11000232c490bd83168f1df8ff6aa25 100644
--- a/chrome/renderer/resources/extensions/page_capture_custom_bindings.js
+++ b/chrome/renderer/resources/extensions/page_capture_custom_bindings.js
@@ -4,7 +4,7 @@
 
 // Custom binding for the pageCapture API.
 
-var binding = require('binding').Binding.create('pageCapture');
+var binding = apiBridge || require('binding').Binding.create('pageCapture');
 
 var handleUncaughtException = require('uncaught_exception_handler').handle;
 var pageCaptureNatives = requireNative('page_capture');
@@ -32,4 +32,5 @@ binding.registerCustomHook(function(bindingsAPI) {
   });
 });
 
-exports.$set('binding', binding.generate());
+if (!apiBridge)
+  exports.$set('binding', binding.generate());