Pass JavaRef to WebContents::FromJavaWebContents.

chrome/browser/android/contextualsearch/contextual_search_manager.h

Index: chrome/browser/android/contextualsearch/contextual_search_manager.h
diff --git a/chrome/browser/android/contextualsearch/contextual_search_manager.h b/chrome/browser/android/contextualsearch/contextual_search_manager.h
index 6465a74cdc3be842ece838f0d6489812c4e458da..f0aa73b35b0754eed3d3ac93184e48f28afcaf08 100644
--- a/chrome/browser/android/contextualsearch/contextual_search_manager.h
+++ b/chrome/browser/android/contextualsearch/contextual_search_manager.h
@@ -21,7 +21,8 @@ class ContextualSearchManager
     : public contextual_search::ContextualSearchJsApiHandler {
  public:
   // Constructs a native manager associated with the Java manager.
-  ContextualSearchManager(JNIEnv* env, jobject obj);
+  ContextualSearchManager(JNIEnv* env,
+                          const base::android::JavaRef<jobject>& obj);
   ~ContextualSearchManager() override;
 
   // Called by the Java ContextualSearchManager when it is being destroyed.