Support start and stopping systrace from repl

Reviewed By: @jspahrsummers

Differential Revision: D2512911

fb-gh-sync-id: f5441219f9d7063b3602c55efac9f07407e33f56

React/Base/RCTBatchedBridge.m

@@ -889,24 +889,19 @@ RCT_NOT_IMPLEMENTED(- (instancetype)initWithBundleURL:(__unused NSURL *)bundleUR
 {
   RCTAssertMainThread();
 
-  if (![self.bundleURL.scheme isEqualToString:@"http"]) {
-    RCTLogError(@"To run the profiler you must be running from the dev server");
-    return;
-  }
-
   [_javaScriptExecutor executeBlockOnJavaScriptQueue:^{
     RCTProfileInit(self);
   }];
 }
 
-- (void)stopProfiling
+- (void)stopProfiling:(void (^)(NSData *))callback
 {
   RCTAssertMainThread();
 
   [_javaScriptExecutor executeBlockOnJavaScriptQueue:^{
     NSString *log = RCTProfileEnd(self);
     NSData *logData = [log dataUsingEncoding:NSUTF8StringEncoding];
-    RCTProfileSendResult(self, @"systrace", logData);
+    callback(logData);
   }];
 }
 

React/Modules/RCTDevMenu.m

@@ -26,7 +26,7 @@
 @interface RCTBridge (Profiling)
 
 - (void)startProfiling;
-- (void)stopProfiling;
+- (void)stopProfiling:(void (^)(NSData *))callback;
 
 @end
 
@@ -520,7 +520,9 @@ RCT_EXPORT_METHOD(reload)
     if (enabled) {
       [_bridge startProfiling];
     } else {
-      [_bridge stopProfiling];
+      [_bridge stopProfiling:^(NSData *logData) {
+        RCTProfileSendResult(_bridge, @"systrace", logData);
+      }];
     }
   }
 }