Use invalidation sets for :hover, :active, and :focus.

LayoutTests/fast/css/invalidation/targeted-hover-invalidation-expected.txt

Index: LayoutTests/fast/css/invalidation/targeted-hover-invalidation-expected.txt
diff --git a/LayoutTests/fast/css/invalidation/targeted-hover-invalidation-expected.txt b/LayoutTests/fast/css/invalidation/targeted-hover-invalidation-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..074e13baf65680ee6348e66efba1c6ca0a0c03f7
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+++ b/LayoutTests/fast/css/invalidation/targeted-hover-invalidation-expected.txt
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+Check that invalidation sets work for :hover changes.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS window.internals is defined.
+PASS window.eventSender is defined.
+PASS getComputedStyle(r1, null).backgroundColor is transparent
+PASS getComputedStyle(r2, null).backgroundColor is transparent
+PASS r3.length is 2
+PASS getComputedStyle(r3[0], null).backgroundColor is transparent
+PASS getComputedStyle(r3[1], null).backgroundColor is transparent
+PASS internals.updateStyleAndReturnAffectedElementCount() is 1
+PASS getComputedStyle(r1, null).backgroundColor is green
+PASS internals.updateStyleAndReturnAffectedElementCount() is 2
+PASS getComputedStyle(r2, null).backgroundColor is green
+PASS internals.updateStyleAndReturnAffectedElementCount() is 3
+PASS getComputedStyle(r3[0], null).backgroundColor is green
+PASS getComputedStyle(r3[1], null).backgroundColor is green
+PASS successfullyParsed is true
+
+TEST COMPLETE
+