Turn off Task Manager should not break the build on Linux

chrome/browser/extensions/api/processes/processes_api.cc

Index: chrome/browser/extensions/api/processes/processes_api.cc
diff --git a/chrome/browser/extensions/api/processes/processes_api.cc b/chrome/browser/extensions/api/processes/processes_api.cc
index ad4d525c37f5a45224abbe6ce98d3725723a8f48..6d6034e66843ac4c742c59c125147e396086d828 100644
--- a/chrome/browser/extensions/api/processes/processes_api.cc
+++ b/chrome/browser/extensions/api/processes/processes_api.cc
@@ -640,6 +640,7 @@ bool TerminateFunction::RunImpl() {
 
 
 void TerminateFunction::TerminateProcess() {
+#if defined(ENABLE_TASK_MANAGER)
   TaskManagerModel* model = TaskManager::GetInstance()->model();
 
   int count = model->ResourceCount();
@@ -669,6 +670,10 @@ void TerminateFunction::TerminateProcess() {
 
   // Balance the AddRef in the RunImpl.
   Release();
+#else
+  error_ = errors::kExtensionNotSupported;
+  SendResponse(false);
+#endif  // defined(ENABLE_TASK_MANAGER)
 }
 
 GetProcessInfoFunction::GetProcessInfoFunction()