Css: change boxSizingReliable in IE<9.

Change boxSizingReliable test value to false in all IE versions.
Modify support comments to argument getComputedStyle guards
with oldIE support and not node.js which is not supported in 1.x.

Closes gh-1498

src/css/support.js

@@ -94,11 +94,10 @@ define([
 
 		// Support: IE<9
 		// Assume reasonable values in the absence of getComputedStyle
-		pixelPositionVal = false;
-		reliableMarginRightVal = boxSizingReliableVal = true;
+		pixelPositionVal = boxSizingReliableVal = false;
+		reliableMarginRightVal = true;
 
-		// Support: node.js jsdom
-		// Don't assume that getComputedStyle is a property of the global object
+		// Check for getComputedStyle so that this code is not run in IE<9.
 		if ( window.getComputedStyle ) {
 			pixelPositionVal = ( window.getComputedStyle( div, null ) || {} ).top !== "1%";
 			boxSizingReliableVal =

test/unit/support.js

@@ -267,7 +267,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"ajax": true,
 			"appendChecked": true,
 			"boxSizing": true,
-			"boxSizingReliable": true,
+			"boxSizingReliable": false,
 			"changeBubbles": false,
 			"checkClone": true,
 			"checkOn": true,
@@ -304,7 +304,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"ajax": true,
 			"appendChecked": false,
 			"boxSizing": false,
-			"boxSizingReliable": true,
+			"boxSizingReliable": false,
 			"changeBubbles": false,
 			"checkClone": true,
 			"checkOn": true,
@@ -341,7 +341,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"ajax": true,
 			"appendChecked": false,
 			"boxSizing": false,
-			"boxSizingReliable": true,
+			"boxSizingReliable": false,
 			"changeBubbles": false,
 			"checkClone": true,
 			"checkOn": true,