ime: Fix incorrect rule-based altgr test.

The event code is incorrect. Should be "KeyA", not "A". Fix the
expectations to match the purpose of the test.

Bug: 1035145
Change-Id: I5f269aea5bae9f441b4021f8c5c5e3ccea1ba6d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2371386Reviewed-by: Keith Lee <keithlee@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802994}

chromeos/services/ime/ime_service_unittest.cc

@@ -257,13 +257,13 @@ TEST_F(ImeServiceTest, RuleBasedHandlesAltRight) {
                                            false, false, false),
       base::BindOnce(&TestProcessKeypressForRulebasedCallback, &response));
   to_engine_remote->ProcessKeypressForRulebased(
-      mojom::KeypressInfoForRulebased::New("keydown", "A", false, false, false,
-                                           false, true),
+      mojom::KeypressInfoForRulebased::New("keydown", "KeyA", false, false,
+                                           false, false, true),
       base::BindOnce(&TestProcessKeypressForRulebasedCallback, &response));
   to_engine_remote.FlushForTesting();
 
-  EXPECT_EQ(response.result, false);
-  ASSERT_EQ(0U, response.operations.size());
+  EXPECT_EQ(response.result, true);
+  ASSERT_EQ(1U, response.operations.size());
 }
 
 // Tests that the rule-based Arabic keyboard can work correctly.