Merge 135082 - REGRESSION(r129644): User StyleSheet not applying

Merge 135082 - REGRESSION(r129644): User StyleSheet not applying
https://bugs.webkit.org/show_bug.cgi?id=102110

Reviewed by Andreas Kling.

Source/WebCore:

Injected stylesheets added as UserStyleAuthorLevel fail to apply. r129644 implicitly assumed that
such things don't exists but on Chromium addUserStyleSheet() confusingly uses them.

The patch adds injected author stylesheets to DocumentStyleSheetCollection::activeStyleSheets().
It also generally cleans up the code around injected and user stylesheets.

Tests: userscripts/user-script-and-stylesheet.html
       userscripts/user-stylesheet-invalidate.html

* css/StyleResolver.cpp:
(WebCore::StyleResolver::StyleResolver):
(WebCore::StyleResolver::collectRulesFromUserStyleSheets):
(WebCore::collectCSSOMWrappers):
* css/StyleResolver.h:
(StyleResolver):
* dom/Document.cpp:
(WebCore::Document::setCompatibilityMode):
* dom/DocumentStyleSheetCollection.cpp:
(WebCore::DocumentStyleSheetCollection::DocumentStyleSheetCollection):
(WebCore::DocumentStyleSheetCollection::~DocumentStyleSheetCollection):
(WebCore::DocumentStyleSheetCollection::injectedUserStyleSheets):
(WebCore):
(WebCore::DocumentStyleSheetCollection::injectedAuthorStyleSheets):
(WebCore::DocumentStyleSheetCollection::updateInjectedStyleSheetCache):
(WebCore::DocumentStyleSheetCollection::invalidateInjectedStyleSheetCache):
(WebCore::DocumentStyleSheetCollection::addUserSheet):
(WebCore::DocumentStyleSheetCollection::updateActiveStyleSheets):
(WebCore::DocumentStyleSheetCollection::reportMemoryUsage):
* dom/DocumentStyleSheetCollection.h:
(WebCore::DocumentStyleSheetCollection::documentUserStyleSheets):
(DocumentStyleSheetCollection):
* page/PageGroup.cpp:
(WebCore::PageGroup::addUserStyleSheetToWorld):
(WebCore::PageGroup::removeUserStyleSheetFromWorld):
(WebCore::PageGroup::removeUserStyleSheetsFromWorld):
(WebCore::PageGroup::removeAllUserContent):
(WebCore::PageGroup::invalidatedInjectedStyleSheetCacheInAllFrames):
* page/PageGroup.h:
(PageGroup):

LayoutTests:

* inspector/timeline/timeline-script-tag-1-expected.txt:

    Update the test result. The style invalidation log is slightly different.

* userscripts/user-stylesheet-invalidate-expected.txt: Added.
* userscripts/user-stylesheet-invalidate.html: Added.


TBR=antti@apple.com
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=135773