Android: Fix default filename for kTraceStartup file

content/browser/android/tracing_controller_android.h

Index: content/browser/android/tracing_controller_android.h
diff --git a/content/browser/android/tracing_controller_android.h b/content/browser/android/tracing_controller_android.h
index 4d70e7b75ef912a557bebf61af854d23c3fbec6c..cf5625999f2c90a78b3455d45b0cbd7dad182ecd 100644
--- a/content/browser/android/tracing_controller_android.h
+++ b/content/browser/android/tracing_controller_android.h
@@ -19,17 +19,16 @@ class TracingControllerAndroid {
 
   bool StartTracing(JNIEnv* env,
                     jobject obj,
-                    jstring filename,
                     jstring categories,
                     jboolean record_continuously);
-  void StopTracing(JNIEnv* env, jobject obj);
+  void StopTracing(JNIEnv* env, jobject obj, jstring jfilepath);
+  static void GenerateTracingFilePath(base::FilePath* file_path);
 
  private:
   ~TracingControllerAndroid();
   void OnTracingStopped(const base::FilePath& file_path);
 
   JavaObjectWeakGlobalRef weak_java_object_;
-  base::FilePath file_path_;
   base::WeakPtrFactory<TracingControllerAndroid> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TracingControllerAndroid);