[Extensions Bindings] Add an ExceptionHandler class

extensions/renderer/bindings/api_bindings_system.h

Index: extensions/renderer/bindings/api_bindings_system.h
diff --git a/extensions/renderer/bindings/api_bindings_system.h b/extensions/renderer/bindings/api_bindings_system.h
index 82351c3fd6645d3f6cb64e4206ccfd08f61e5299..4487f348cdfa41235de0e656073b6a1312df1c5c 100644
--- a/extensions/renderer/bindings/api_bindings_system.h
+++ b/extensions/renderer/bindings/api_bindings_system.h
@@ -18,6 +18,7 @@
 #include "extensions/renderer/bindings/api_request_handler.h"
 #include "extensions/renderer/bindings/api_type_reference_map.h"
 #include "extensions/renderer/bindings/binding_access_checker.h"
+#include "extensions/renderer/bindings/exception_handler.h"
 
 namespace base {
 class DictionaryValue;
@@ -52,6 +53,7 @@ class APIBindingsSystem {
       const APIEventHandler::EventListenersChangedMethod&
           event_listeners_changed,
       const APIBinding::OnSilentRequest& on_silent_request,
+      const binding::AddConsoleError& add_console_error,
       APILastError last_error);
   ~APIBindingsSystem();
 
@@ -95,6 +97,7 @@ class APIBindingsSystem {
   APIRequestHandler* request_handler() { return &request_handler_; }
   APIEventHandler* event_handler() { return &event_handler_; }
   APITypeReferenceMap* type_reference_map() { return &type_reference_map_; }
+  ExceptionHandler* exception_handler() { return &exception_handler_; }
 
  private:
   // Creates a new APIBinding for the given |api_name|.
@@ -114,6 +117,9 @@ class APIBindingsSystem {
   // The map of cached API reference types.
   APITypeReferenceMap type_reference_map_;
 
+  // The exception handler for the system.
+  ExceptionHandler exception_handler_;
+
   // The request handler associated with the system.
   APIRequestHandler request_handler_;