change return type of StartNetLogToFile

components/cronet/android/cronet_url_request_context_adapter.h

Index: components/cronet/android/cronet_url_request_context_adapter.h
diff --git a/components/cronet/android/cronet_url_request_context_adapter.h b/components/cronet/android/cronet_url_request_context_adapter.h
index 901f26c67c208c70861fb09b9ed5af8716c7c49f..647cc0630742fe8db1f70a26a5e4355b8b664c15 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.h
+++ b/components/cronet/android/cronet_url_request_context_adapter.h
@@ -79,8 +79,9 @@ class CronetURLRequestContextAdapter
 
   net::URLRequestContext* GetURLRequestContext();
 
-  // Starts NetLog logging to file. This can be called on any thread.
-  void StartNetLogToFile(JNIEnv* env,
+  // Starts NetLog logging to file. This can be called on any thread.  Returns
+  // false if it fails to open log file.
+  bool StartNetLogToFile(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& jcaller,
                          const base::android::JavaParamRef<jstring>& jfile_name,
                          jboolean jlog_all);