Remove unused NativeExtensionBindingsSystem::GetRequestSender().

Bug: None
Test: No changes expected.
Change-Id: I93dfe47a7342f4dae595d249d422bbb6c52ae1c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1730858
Auto-Submit: Istiaque Ahmed <lazyboy@chromium.org>
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684484}

extensions/renderer/native_extension_bindings_system.cc

@@ -653,10 +653,6 @@ void NativeExtensionBindingsSystem::HandleResponse(
   ipc_message_sender_->SendOnRequestResponseReceivedIPC(request_id);
 }
 
-RequestSender* NativeExtensionBindingsSystem::GetRequestSender() {
-  return nullptr;
-}
-
 IPCMessageSender* NativeExtensionBindingsSystem::GetIPCMessageSender() {
   return ipc_message_sender_.get();
 }

extensions/renderer/native_extension_bindings_system.h

@@ -18,7 +18,6 @@
 
 namespace extensions {
 class IPCMessageSender;
-class RequestSender;
 class ScriptContext;
 class ScriptContextSetIterable;
 
@@ -67,10 +66,6 @@ class NativeExtensionBindingsSystem {
                       const base::ListValue& response,
                       const std::string& error);
 
-  // Returns the associated RequestSender, if any.
-  // TODO(devlin): Factor this out.
-  RequestSender* GetRequestSender();
-
   // Returns the associated IPC message sender.
   IPCMessageSender* GetIPCMessageSender();