Switch LayoutTests to use renamed methods for deprecated text alternatives

LayoutTests/accessibility/canvas-description-and-role.html

Index: LayoutTests/accessibility/canvas-description-and-role.html
diff --git a/LayoutTests/accessibility/canvas-description-and-role.html b/LayoutTests/accessibility/canvas-description-and-role.html
index 46f63befef5056c9949b03caf28866c4d9a33310..82dbcbbb85812db023953724db629748b534bea8 100644
--- a/LayoutTests/accessibility/canvas-description-and-role.html
+++ b/LayoutTests/accessibility/canvas-description-and-role.html
@@ -21,11 +21,11 @@ if (window.testRunner && window.accessibilityController) {
     shouldBe("axContainer.childrenCount", "2");
 
     var axCanvas1 = axContainer.childAtIndex(0);
-    debug('Canvas 1 description: ' + axCanvas1.description);
+    debug('Canvas 1 description: ' + axCanvas1.deprecatedDescription);
     debug('Canvas 1 role: ' + axCanvas1.role);
 
     var axCanvas2 = axContainer.childAtIndex(1);
-    debug('Canvas 2 description: ' + axCanvas2.description);
+    debug('Canvas 2 description: ' + axCanvas2.deprecatedDescription);
     debug('Canvas 2 role: ' + axCanvas2.role);
 }