Reviewed by Dave Hyatt.

        <rdar://problem/5569233> Add the ability to disable author and user CSS styles

        * WebCore.base.exp: Add the Settings::setAuthorAndUserStylesEnabled symbol.
        * css/CSSStyleSelector.cpp:
        (WebCore::CSSStyleSelector::CSSStyleSelector): Add a new matchAuthorAndUserStyles parameter.
        (WebCore::CSSStyleSelector::styleForElement): Check m_matchAuthorAndUserStyles before
        matching user and author rules.
        (WebCore::CSSStyleSelector::pseudoStyleForElement): Ditto.
        (WebCore::CSSStyleSelector::styleRulesForElement): Ditto.
        * css/CSSStyleSelector.h: Add m_matchAuthorAndUserStyles and new constructor parameter.
        * dom/Document.cpp:
        (WebCore::Document::Document): Pass Settings::authorAndUserStylesEnabled to the CSSStyleSelector.
        (WebCore::Document::recalcStyleSelector): Skip collecting the author stylesheets if
        Settings::authorAndUserStylesEnabled is false, and pass that to the CSSStyleSelector.
        * page/Settings.cpp:
        (WebCore::Settings::Settings): Initialize m_authorAndUserStylesEnabled to true.
        (WebCore::Settings::setAuthorAndUserStylesEnabled): Recalc style in all the frames
        when the setting changes.
        * page/Settings.h: Add m_authorAndUserStylesEnabled.
        (WebCore::Settings::authorAndUserStylesEnabled): Return m_authorAndUserStylesEnabled.

WebKit/mac:

        Reviewed by Dave Hyatt.

        <rdar://problem/5569233> Add the ability to disable author and user CSS styles

        * WebView/WebPreferenceKeysPrivate.h: Define WebKitRespectStandardStyleKeyEquivalentsPreferenceKey.
        * WebView/WebPreferences.m:
        (+[WebPreferences initialize]): Default WebKitRespectStandardStyleKeyEquivalentsPreferenceKey to YES.
        (-[WebPreferences authorAndUserStylesEnabled]): Return the setting's BOOL value.
        (-[WebPreferences setAuthorAndUserStylesEnabled:]): Set the setting's BOOL value.
        * WebView/WebPreferencesPrivate.h: Add authorAndUserStylesEnabled and setAuthorAndUserStylesEnabled:.
        * WebView/WebView.mm:
        (-[WebView _preferencesChangedNotification:]): Update WebCore::Settings::authorAndUserStylesEnabled.

WebKitTools:

        Reviewed by Dave Hyatt.

        <rdar://problem/5569233> Add the ability to disable author and user CSS styles
        
        Add support for disabling author and user styles for testing.

        * DumpRenderTree/DumpRenderTree.xcodeproj/project.pbxproj:
        * DumpRenderTree/LayoutTestController.cpp:
        (setAuthorAndUserStylesEnabledCallback):
        (LayoutTestController::staticFunctions):
        * DumpRenderTree/LayoutTestController.h:
        * DumpRenderTree/mac/LayoutTestControllerMac.mm:
        (LayoutTestController::setAuthorAndUserStylesEnabled):
        * DumpRenderTree/win/LayoutTestControllerWin.cpp:
        (LayoutTestController::setAuthorAndUserStylesEnabled):

LayoutTests:

        Reviewed by Dave Hyatt.

        Test for: <rdar://problem/5569233> Add the ability to disable author and user CSS styles

        * fast/css/disabled-author-styles.html: Added.
        * platform/mac/fast/css/disabled-author-styles-expected.txt: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@28071 268f45cc-cd09-0410-ab3c-d52691b4dbfc