[EFL][WK2] Simplify context_menu_spelling_items_availability unit test
https://bugs.webkit.org/show_bug.cgi?id=119085

Reviewed by Gyuyoung Kim.

Use findContextMenuItem method to check whether the item
appears in context menu.

* UIProcess/API/efl/tests/test_ewk2_text_checker.cpp:
(EWK2TextCheckerTest::findContextMenuItem):
Do not report failure inside the method.
It doesn't allow to test the negative test cases.

(EWK2TextCheckerTest::checkCorrectnessOfSpellingItems):
Use findContextMenuItem method.

(EWK2TextCheckerTest::toogleCheckSpellingWhileTyping):
(EWK2TextCheckerTest::selectLearnSpelling):
(EWK2TextCheckerTest::selectIgnoreSpelling):
Verify the return value of findContextMenuItem.

(TEST_F):
Reset wasContextMenuShown variable, it's needed after r152153.
Use waitUntilTrue method.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153419 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[EFL] Improve string use in ErrorsEfl
https://bugs.webkit.org/show_bug.cgi?id=119207

Reviewed by Christophe Dumez.

Use ASCIILiteral for constant strings becoming WTFStrings.

No behavior change.

* platform/efl/ErrorsEfl.cpp:
(WebCore::cancelledError):
(WebCore::blockedError):
(WebCore::cannotShowURLError):
(WebCore::interruptedForPolicyChangeError):
(WebCore::cannotShowMIMETypeError):
(WebCore::fileDoesNotExistError):
(WebCore::pluginWillHandleLoadError):
(WebCore::downloadCancelledByUserError):
(WebCore::printerNotFoundError):
(WebCore::invalidPageRangeToPrint):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153420 268f45cc-cd09-0410-ab3c-d52691b4dbfc