Remove base/mac/scoped_nsexception_enabler.h.

chrome/browser/spellchecker/spellcheck_platform_mac.mm

Index: chrome/browser/spellchecker/spellcheck_platform_mac.mm
diff --git a/chrome/browser/spellchecker/spellcheck_platform_mac.mm b/chrome/browser/spellchecker/spellcheck_platform_mac.mm
index 4e5061d2e0a99d1d0e2a69d6fb44631aa81ef490..a22f8296a1485c7e495bb4362d5a1040eab594c2 100644
--- a/chrome/browser/spellchecker/spellcheck_platform_mac.mm
+++ b/chrome/browser/spellchecker/spellcheck_platform_mac.mm
@@ -12,7 +12,6 @@
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
-#include "base/mac/scoped_nsexception_enabler.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/time/time.h"
 #include "chrome/common/spellcheck_common.h"
@@ -36,10 +35,11 @@ const unsigned int kShortLanguageCodeSize = 2;
 // spell-checking will not work, but it also will not crash the
 // browser.
 NSSpellChecker* SharedSpellChecker() {
-  return base::mac::ObjCCastStrict<NSSpellChecker>(
-      base::mac::RunBlockIgnoringExceptions(^{
-          return [NSSpellChecker sharedSpellChecker];
-      }));
+  @try {
+    return [NSSpellChecker sharedSpellChecker];
+  } @catch (id exception) {
+    return nil;
+  }
 }
 
 // A private utility function to convert hunspell language codes to OS X