[DevTools] Clean up text autosizing.

LayoutTests/inspector/text-autosizing-override.html

Index: LayoutTests/inspector/text-autosizing-override.html
diff --git a/LayoutTests/inspector/text-autosizing-override.html b/LayoutTests/inspector/text-autosizing-override.html
index c64fa37f475969c8a8639b266d9c541b541a3d30..948638558e58a504a678f682f9f87c7d33695ab1 100644
--- a/LayoutTests/inspector/text-autosizing-override.html
+++ b/LayoutTests/inspector/text-autosizing-override.html
@@ -72,9 +72,17 @@
         });
       },
 
-      function checkNotAutosizedWithoutDeviceMetrics(next) {
+      function checkAutosizedWithoutDeviceMetrics(next) {
         PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, emulateViewport: false, fitWindow: false, textAutosizing: true}, function() {
-          assertAutosizingResult(false, next);
+          assertAutosizingResult(true, next);
+        });
+      },
+
+      function checkNotAutosizedWithoutDeviceMetrics(next) {
+        InspectorTest.evaluateInPage("forceAutosizing(false)", function() {
+          PageAgent.invoke_setDeviceMetricsOverride({width: 0, height: 0, deviceScaleFactor: 0, emulateViewport: false, fitWindow: false, textAutosizing: true}, function() {
+            assertAutosizingResult(false, next);
+          });
         });
       },