Reviewed by Martin Robinson.

        [GTK] Cleanup needed in testatk.c file
        https://bugs.webkit.org/show_bug.cgi?id=48759

        Cleanup done in testatk.c, mainly addressing the following issues:

        - Removed any trace of extra main loops in tests, so now we just
        spin the original main loop in all of them to get the a11y
        objects.

        - As we no longer use the extra main loops, removed the bail_out
        function, used along with g_idle_add() to stop those extra loops.

        - As we now spin the loop in every test, created a new function
        waitForAccessibilityObjects() to write the loop just once.

        - Fixed name in incorrectly named test testWekitAtkTextSelections.

        - Alphabetically sorted the list of includes.

        - Renamed all identifiers to camel Case notation.

        - Declare variables when needed only (instead of declaring all of
        them at the beginning of the function).

        - Don't declare two variables of the same type in the same line.

        - No more short names like 'obj', 'textObj' or 'alloc'. Use names
        like 'object', 'textObject' and 'allocation' instead.

        - Fixed indentation.

        - Make sure all comments finish with '.'

        - Replace NULL's with 0's.

        * tests/testatk.c:
        (waitForAccessibleObjects): New, manually spins the main context
        to make sure accessible objects are created before continuing.
        (testGetTextFunction): Fixed this function to be compliant with
        the WebKit's coding style.
        (runGetTextTests): Ditto.
        (testWebkitAtkGetTextAtOffsetForms): Ditto.
        (testWebkitAtkGetTextAtOffset): Ditto.
        (testWebkitAtkGetTextAtOffsetNewlines): Ditto.
        (testWebkitAtkGetTextAtOffsetTextarea): Ditto.
        (testWebkitAtkGetTextAtOffsetTextInput): Ditto.
        (testWebkitAtkGetTextInParagraphAndBodySimple): Ditto.
        (testWebkitAtkGetTextInParagraphAndBodyModerate): Ditto.
        (testWebkitAtkGetTextInTable): Ditto.
        (testWebkitAtkGetHeadersInTable): Ditto.
        (compAtkAttribute): Ditto.
        (atkAttributeSetAttributeNameHasValue): Ditto.
        (testWebkitAtkTextAttributes): Ditto.
        (testWebkitAtkTextSelections): Ditto.
        (testWebkitAtkGetExtents): Ditto.
        (testWebkitAtkLayoutAndDataTables): Ditto.
        (testWebkitAtkLinksWithInlineImages): Ditto.
        (testWebkitAtkHypertextAndHyperlinks): Ditto.
        (testWebkitAtkListsOfItems): Ditto.
        (testWebkitAtkTextChangedNotifications): Ditto.
        (main): Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@71052 268f45cc-cd09-0410-ab3c-d52691b4dbfc