Add text autosizing override in the inspector.

Source/core/inspector/InspectorInstrumentation.idl

Index: Source/core/inspector/InspectorInstrumentation.idl
diff --git a/Source/core/inspector/InspectorInstrumentation.idl b/Source/core/inspector/InspectorInstrumentation.idl
index 9f652b543dfe3d98a6ef680c6f4d0837c17b99a6..62d364a7bab14622c241a48f9c041413800f011e 100644
--- a/Source/core/inspector/InspectorInstrumentation.idl
+++ b/Source/core/inspector/InspectorInstrumentation.idl
@@ -494,6 +494,9 @@ interface InspectorOverrides {
     [Page, Inline=FastReturn]
     DeviceOrientationData* overrideDeviceOrientation(Page* page, [DefaultReturn] DeviceOrientationData* deviceOrientation);
 
+    [Page, Inline=FastReturn]
+    bool overrideTextAutosizing(Page* page, [DefaultReturn] bool textAutosizing);
+
     [Profiler]
     String getCurrentUserInitiatedProfileName(ExecutionContext* context, bool incrementProfileNumber);
 }