tracing: get rid of files in TracingController interface

content/browser/android/tracing_controller_android.cc

Index: content/browser/android/tracing_controller_android.cc
diff --git a/content/browser/android/tracing_controller_android.cc b/content/browser/android/tracing_controller_android.cc
index 42f4b0cb12b2d0c20909b3f4e616df7d3c7386be..dcbb4ab8e0a261e818a14256619969ce9ef34383 100644
--- a/content/browser/android/tracing_controller_android.cc
+++ b/content/browser/android/tracing_controller_android.cc
@@ -54,11 +54,11 @@ void TracingControllerAndroid::StopTracing(JNIEnv* env,
   base::FilePath file_path(
       base::android::ConvertJavaStringToUTF8(env, jfilepath));
   if (!TracingController::GetInstance()->DisableRecording(
-      file_path,
-      base::Bind(&TracingControllerAndroid::OnTracingStopped,
-                 weak_factory_.GetWeakPtr()))) {
+      TracingController::CreateFileSink(file_path,
+          base::Bind(&TracingControllerAndroid::OnTracingStopped,
+                     weak_factory_.GetWeakPtr())))) {
     LOG(ERROR) << "EndTracingAsync failed, forcing an immediate stop";
-    OnTracingStopped(file_path);
+    OnTracingStopped();
   }
 }
 
@@ -71,8 +71,7 @@ void TracingControllerAndroid::GenerateTracingFilePath(
       base::android::ConvertJavaStringToUTF8(env, jfilename.obj()));
 }
 
-void TracingControllerAndroid::OnTracingStopped(
-    const base::FilePath& file_path) {
+void TracingControllerAndroid::OnTracingStopped() {
   JNIEnv* env = base::android::AttachCurrentThread();
   base::android::ScopedJavaLocalRef<jobject> obj = weak_java_object_.get(env);
   if (obj.obj())