Rename ActionExitCode to ErrorCode

Nowadays ActionExitCode is used throughout the codebase so use a more
generic name to reflect this.

BUG=chromium:216507
TEST=unit tests pass

Change-Id: I23d1d7e2676443251dbc42ed137fd018aadfa8a3
Reviewed-on: https://gerrit.chromium.org/gerrit/49512
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Commit-Queue: David Zeuthen <zeuthen@chromium.org>
Tested-by: David Zeuthen <zeuthen@chromium.org>
diff --git a/omaha_response_handler_action_unittest.cc b/omaha_response_handler_action_unittest.cc
index cb27f82..15a1f06 100644
--- a/omaha_response_handler_action_unittest.cc
+++ b/omaha_response_handler_action_unittest.cc
@@ -35,17 +35,17 @@
     : public ActionProcessorDelegate {
  public:
   OmahaResponseHandlerActionProcessorDelegate()
-      : code_(kActionCodeError),
+      : code_(kErrorCodeError),
         code_set_(false) {}
   void ActionCompleted(ActionProcessor* processor,
                        AbstractAction* action,
-                       ActionExitCode code) {
+                       ErrorCode code) {
     if (action->Type() == OmahaResponseHandlerAction::StaticType()) {
       code_ = code;
       code_set_ = true;
     }
   }
-  ActionExitCode code_;
+  ErrorCode code_;
   bool code_set_;
 };
 
@@ -91,7 +91,7 @@
   if (out)
     *out = collector_action.object();
   EXPECT_TRUE(delegate.code_set_);
-  return delegate.code_ == kActionCodeSuccess;
+  return delegate.code_ == kErrorCodeSuccess;
 }
 
 bool OmahaResponseHandlerActionTest::DoTest(const OmahaResponse& in,