Reverse style resolution to avoid N^2 walk when building the render tree

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 522f658eedf39ab136a46e7c61fa33f4ca09244d..e2a10a6581d8965ebe485fa1763f369c9416d610 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -872,6 +872,39 @@ crbug.com/237270 http/tests/images/jpeg-partial-load.html [ Pass Timeout ]
 crbug.com/237270 http/tests/images/png-partial-load.html [ Pass Timeout ]
 crbug.com/237270 http/tests/images/png-partial-load-no-alpha.html [ Pass Timeout ]
 
+crbug.com/288225 fast/events/mouseover-mouseout.html [ NeedsRebaseline ]
+crbug.com/288225 fast/replaced/width100percent-textarea.html [ NeedsRebaseline ]
+crbug.com/288225 http/tests/security/contentSecurityPolicy/media-src-blocked.html [ NeedsRebaseline ]
+crbug.com/288225 media/csp-blocks-video.html [ NeedsRebaseline ]
+crbug.com/288225 fast/regions/autoheight-regions-mark.html [ NeedsRebaseline ]
+crbug.com/288225 editing/deleting/delete-block-merge-contents-001.html [ NeedsRebaseline ]
+crbug.com/288225 editing/deleting/delete-block-merge-contents-019.html [ NeedsRebaseline ]
+crbug.com/288225 editing/deleting/delete-block-merge-contents-020.html [ NeedsRebaseline ]
+crbug.com/288225 editing/execCommand/outdent-break-with-style.html [ NeedsRebaseline ]
+crbug.com/288225 editing/inserting/editable-html-element.html [ NeedsRebaseline ]
+crbug.com/288225 editing/inserting/editing-empty-divs.html [ NeedsRebaseline ]
+crbug.com/288225 editing/pasteboard/copy-standalone-image.html [ NeedsRebaseline ]
+crbug.com/288225 editing/pasteboard/paste-match-style-001.html [ NeedsRebaseline ]
+crbug.com/288225 editing/selection/4983858.html [ NeedsRebaseline ]
+crbug.com/288225 editing/selection/drag-to-contenteditable-iframe.html [ NeedsRebaseline ]
+crbug.com/288225 editing/selection/focus-crash.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline-across-paragraph-in-bold.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline-across-paragraph.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline-after-paragraph-in-bold.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline-after-paragraph.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline-from-stylesheet.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline-in-bold.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/remove-underline.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/style-boundary-005.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/typing-style-003.html [ NeedsRebaseline ]
+crbug.com/288225 editing/style/underline.html [ NeedsRebaseline ]
+crbug.com/288225 fast/body-propagation/background-color/004-xhtml.xhtml [ NeedsRebaseline ]
+crbug.com/288225 fast/body-propagation/background-image/004-xhtml.xhtml [ NeedsRebaseline ]
+crbug.com/288225 fast/css/getComputedStyle/getComputedStyle-resolved-values.html [ NeedsRebaseline ]
+crbug.com/288225 fast/dynamic/move-node-with-selection.html [ NeedsRebaseline ]
+crbug.com/288225 fast/inline/positionedLifetime.html [ NeedsRebaseline ]
+
+
 crbug.com/240515 [ Mac ] fast/dom/HTMLMeterElement/meter-styles.html [ ImageOnlyFailure Pass ]
 
 crbug.com/240632 fast/loader/javascript-url-iframe-remove-on-navigate.html [ Skip ]