mac: re-enable two BrowserKeyEventsTest tests

This change re-enables NormalKeyEvents and EditorKeyBindings on Mac.
Both have repeatedly passed locally. AccessKeys is still disabled; it
has some Mac-specific codepaths which I don't yet understand and which
seem not to work.

Bug: 222296,81451
Change-Id: I021d7f6765393975221b1cdd3e8768715e36bd93
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2122807Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753756}

chrome/browser/browser_keyevents_browsertest.cc

@@ -294,13 +294,7 @@ class BrowserKeyEventsTest : public InProcessBrowserTest {
   }
 };
 
-#if defined(OS_MACOSX)
-// http://crbug.com/81451
-#define MAYBE_NormalKeyEvents DISABLED_NormalKeyEvents
-#else
-#define MAYBE_NormalKeyEvents NormalKeyEvents
-#endif
-IN_PROC_BROWSER_TEST_F(BrowserKeyEventsTest, MAYBE_NormalKeyEvents) {
+IN_PROC_BROWSER_TEST_F(BrowserKeyEventsTest, NormalKeyEvents) {
   static const KeyEventTestData kTestNoInput[] = {
     // a
     { ui::VKEY_A, false, false, false, false,
@@ -701,9 +695,6 @@ IN_PROC_BROWSER_TEST_F(BrowserKeyEventsTest, ReservedAccelerators) {
 
 #if defined(OS_MACOSX)
 IN_PROC_BROWSER_TEST_F(BrowserKeyEventsTest, EditorKeyBindings) {
-  // TODO(kbr): re-enable: http://crbug.com/222296
-  return;
-
   static const KeyEventTestData kTestCtrlA = {
     ui::VKEY_A, true, false, false, false,
     false, false, false, false, 4,