Revert "Implement proposed shadow tree cascade order."

LayoutTests/fast/dom/shadow/cascade-of-treeboundary-crossing-rules.html

Index: LayoutTests/fast/dom/shadow/cascade-of-treeboundary-crossing-rules.html
diff --git a/LayoutTests/fast/dom/shadow/cascade-of-treeboundary-crossing-rules.html b/LayoutTests/fast/dom/shadow/cascade-of-treeboundary-crossing-rules.html
index 8cbd70c837d89e64309d24679b410876396d5539..5d7fadd610e18e40294cc022920ae29917b41cac 100644
--- a/LayoutTests/fast/dom/shadow/cascade-of-treeboundary-crossing-rules.html
+++ b/LayoutTests/fast/dom/shadow/cascade-of-treeboundary-crossing-rules.html
@@ -36,18 +36,18 @@ function cleanUp()
 
 description('Test for casacde of treeboundary crossing rules.');
 
-// Rules declared in outer treescope should win.
+// Rules declared in inner treescope should win.
 sandbox.appendChild(
     createDOM('div', {'id': 'host'},
         createDOM('style', {},
-            document.createTextNode('p:empty { border: 1px solid green; }')),
+            document.createTextNode('p:empty { border: 1px solid blue; }')),
         createShadowRoot(
             createDOM('style', {},
                 document.createTextNode('::content > p { border: 1px solid red; }')),
             createDOM('div', {},
                 createShadowRoot(
                     createDOM('style', {},
-                        document.createTextNode('::content > p { border: 1px solid blue; }')),
+                        document.createTextNode('::content > p { border: 1px solid green; }')),
                     createDOM('content', {})),
                 createDOM('content', {}))),
         createDOM('p', {'id': 'target'})));
@@ -103,22 +103,6 @@ borderColorShouldBe('host/target', 'rgb(0, 128, 0)');
 
 cleanUp();
 
-// Comparing important rules declared in outer treescope with important rules declared in inner treescope.
-// Inner's should win.
-sandbox.appendChild(
-    createDOM('div', {},
-        createDOM('style', {},
-            document.createTextNode('div { border: 1px solid red !important; }')),
-        createDOM('div', {'id': 'host'},
-            createShadowRoot(
-                createDOM('style', {},
-                    document.createTextNode('#target { border: 1px solid green !important; }')),
-                createDOM('p', {'id': 'target'})))));
-
-borderColorShouldBe('host/target', 'rgb(0, 128, 0)');
-
-cleanUp();
-
 </script>
 </html>