move file access permission logic to DownloadResourceThrottle

content/browser/android/download_controller_android_impl.h

Index: content/browser/android/download_controller_android_impl.h
diff --git a/content/browser/android/download_controller_android_impl.h b/content/browser/android/download_controller_android_impl.h
index 2363d46d34a2c406bb71e812f6cfd3603c03cd57..4753b906147df580245a998d5cd9b039178a8fd1 100644
--- a/content/browser/android/download_controller_android_impl.h
+++ b/content/browser/android/download_controller_android_impl.h
@@ -56,7 +56,8 @@ class DownloadControllerAndroidImpl : public DownloadControllerAndroid,
 
   // DownloadControllerAndroid implementation.
   void AcquireFileAccessPermission(
-      WebContents* web_contents,
+      int render_process_id,
+      int render_view_id,
       const AcquireFileAccessPermissionCallback& callback) override;
 
  private:
@@ -136,8 +137,6 @@ class DownloadControllerAndroidImpl : public DownloadControllerAndroid,
   base::android::ScopedJavaLocalRef<jobject> GetContentViewCoreFromWebContents(
       WebContents* web_contents);
 
-  WebContents* GetWebContents(int render_process_id, int render_view_id);
-
   // Creates Java object if it is not created already and returns it.
   JavaObject* GetJavaObject();