improve detection of inspectable JS contexts

Reviewed By: Hypuk

Differential Revision: D6578735

fbshipit-source-id: ac6a3a8bae9aef7fd3b4a036c3f154b3f6b7d80c

React/DevSupport/RCTInspectorDevServerHelper.h

@@ -10,8 +10,7 @@
 
 @interface RCTInspectorDevServerHelper : NSObject
 
-+ (void)connectForContext:(JSGlobalContextRef)context
-            withBundleURL:(NSURL *)bundleURL;
++ (void)connectWithBundleURL:(NSURL *)bundleURL;
 + (void)disableDebugger;
 + (void)attachDebugger:(NSString *)owner
          withBundleURL:(NSURL *)bundleURL

React/DevSupport/RCTInspectorDevServerHelper.mm

@@ -104,13 +104,8 @@ static void displayErrorAlert(UIViewController *view, NSString *message) {
   sendEventToAllConnections(kDebuggerMsgDisable);
 }
 
-+ (void)connectForContext:(JSGlobalContextRef)context
-            withBundleURL:(NSURL *)bundleURL
++ (void)connectWithBundleURL:(NSURL *)bundleURL
 {
-  if (!isCustomJSCPtr(context)) {
-    return;
-  }
-
   NSURL *inspectorURL = getInspectorDeviceUrl(bundleURL);
 
   // Note, using a static dictionary isn't really the greatest design, but

React/Modules/RCTDevSettings.mm

@@ -195,12 +195,13 @@ RCT_EXPORT_MODULE()
   // finished with its initialisation. But it does finish by the time it
   // relinquishes control of the main thread, so only queue on the JS thread
   // after the current main thread operation is done.
-  dispatch_async(dispatch_get_main_queue(), ^{
-    [bridge dispatchBlock:^{
-      [RCTInspectorDevServerHelper connectForContext:bridge.jsContextRef
-                                       withBundleURL:bridge.bundleURL];
-    } queue:RCTJSThread];
-  });
+  if (self.isNuclideDebuggingAvailable) {
+    dispatch_async(dispatch_get_main_queue(), ^{
+      [bridge dispatchBlock:^{
+        [RCTInspectorDevServerHelper connectWithBundleURL:bridge.bundleURL];
+      } queue:RCTJSThread];
+    });
+  }
 #endif
 }
 
@@ -256,10 +257,10 @@ static void pokeSamplingProfiler(RCTBridge *const bridge, RCTPackagerClientRespo
 - (BOOL)isNuclideDebuggingAvailable
 {
 #if RCT_ENABLE_INSPECTOR
-  return facebook::react::isCustomJSCPtr(_bridge.jsContextRef);
+  return _bridge.isInspectable;
 #else
   return false;
-#endif //RCT_ENABLE_INSPECTOR
+#endif // RCT_ENABLE_INSPECTOR
 }
 
 - (BOOL)isRemoteDebuggingAvailable