Move the rest of extension_manifest_constants to top-level extensions/

chrome/common/extensions/api/spellcheck/spellcheck_handler.cc

Index: chrome/common/extensions/api/spellcheck/spellcheck_handler.cc
diff --git a/chrome/common/extensions/api/spellcheck/spellcheck_handler.cc b/chrome/common/extensions/api/spellcheck/spellcheck_handler.cc
index b258163cd8acbd14817ef5f9bca9ff59b45fe91a..84a9f13063bc6b709e6ae3c94b4adcbade869526 100644
--- a/chrome/common/extensions/api/spellcheck/spellcheck_handler.cc
+++ b/chrome/common/extensions/api/spellcheck/spellcheck_handler.cc
@@ -5,12 +5,12 @@
 #include "chrome/common/extensions/api/spellcheck/spellcheck_handler.h"
 
 #include "base/strings/utf_string_conversions.h"
-#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
-namespace keys = extensions::manifest_keys;
-namespace errors = extension_manifest_errors;
+namespace keys = manifest_keys;
+namespace errors = manifest_errors;
 
 SpellcheckDictionaryInfo::SpellcheckDictionaryInfo() {
 }