nativeGetDefaultCategories 244 content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java categories = nativeGetDefaultCategories(); nativeGetDefaultCategories 247 content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java DEFAULT_CHROME_CATEGORIES_PLACE_HOLDER, nativeGetDefaultCategories());