Add a way to suppress DevTools logs and warnings (facebook#11448)

Author: gaearon

Diff for: packages/react-reconciler/src/ReactFiberDevToolsHook.js

@@ -37,6 +37,12 @@ export function injectInternals(internals: Object): boolean {
     return false;
   }
   const hook = __REACT_DEVTOOLS_GLOBAL_HOOK__;
+  if (hook.isDisabled) {
+    // This isn't a real property on the hook, but it can be set to opt out
+    // of DevTools integration and associated warnings and logs.
+    // https://github.com/facebook/react/issues/3877
+    return true;
+  }
   if (!hook.supportsFiber) {
     if (__DEV__) {
       warning(