Null check ContentViewCore::GetJavaObject

android_webview/native/external_video_surface_container_impl.h

Index: android_webview/native/external_video_surface_container_impl.h
diff --git a/android_webview/native/external_video_surface_container_impl.h b/android_webview/native/external_video_surface_container_impl.h
index 29e7889e44db54f6ee5d69737b1a47db2297cb41..48ccd94d4f71e804bb48e6ef55d208e0090c611f 100644
--- a/android_webview/native/external_video_surface_container_impl.h
+++ b/android_webview/native/external_video_surface_container_impl.h
@@ -20,7 +20,8 @@ class ExternalVideoSurfaceContainerImpl
   typedef base::Callback<void(int, jobject)> SurfaceCreatedCB;
   typedef base::Callback<void(int)> SurfaceDestroyedCB;
 
-  ExternalVideoSurfaceContainerImpl(content::WebContents* contents);
+  static ExternalVideoSurfaceContainerImpl* Create(
+      content::WebContents* web_contents);
 
   // ExternalVideoSurfaceContainer implementation.
   void RequestExternalVideoSurface(
@@ -39,6 +40,8 @@ class ExternalVideoSurfaceContainerImpl
   void SurfaceDestroyed(JNIEnv* env, jobject obj, jint player_id);
 
  private:
+  explicit ExternalVideoSurfaceContainerImpl(
+      base::android::ScopedJavaLocalRef<jobject> java_content_view_core);
   ~ExternalVideoSurfaceContainerImpl() override;
 
   base::android::ScopedJavaGlobalRef<jobject> jobject_;