Clarify that NTPSnippetsBridge holds a Java SnippetsBridge.

chrome/browser/android/ntp/ntp_snippets_bridge.h

Index: chrome/browser/android/ntp/ntp_snippets_bridge.h
diff --git a/chrome/browser/android/ntp/ntp_snippets_bridge.h b/chrome/browser/android/ntp/ntp_snippets_bridge.h
index 3b36cce073542d003af2ecf0af23daa0559efd34..6fadcb9555ab47e89915768d81ec00fbc72e4bcd 100644
--- a/chrome/browser/android/ntp/ntp_snippets_bridge.h
+++ b/chrome/browser/android/ntp/ntp_snippets_bridge.h
@@ -31,13 +31,10 @@ class NTPSnippetsBridge
     : public ntp_snippets::ContentSuggestionsService::Observer {
  public:
   NTPSnippetsBridge(JNIEnv* env,
+                    const base::android::JavaParamRef<jobject>& j_bridge,
                     const base::android::JavaParamRef<jobject>& j_profile);
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
-  void SetObserver(JNIEnv* env,
-                   const base::android::JavaParamRef<jobject>& obj,
-                   const base::android::JavaParamRef<jobject>& j_observer);
-
   base::android::ScopedJavaLocalRef<jintArray> GetCategories(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
@@ -164,8 +161,8 @@ class NTPSnippetsBridge
                  ntp_snippets::ContentSuggestionsService::Observer>
       content_suggestions_service_observer_;
 
-  // Used to notify the Java side when new snippets have been fetched.
-  base::android::ScopedJavaGlobalRef<jobject> observer_;
+  // The Java SnippetsBridge.
+  base::android::ScopedJavaGlobalRef<jobject> bridge_;
 
   base::WeakPtrFactory<NTPSnippetsBridge> weak_ptr_factory_;