Observer Support for DistilledPagePrefs

components/dom_distiller/core/distilled_page_prefs_android.h

Index: components/dom_distiller/core/distilled_page_prefs_android.h
diff --git a/components/dom_distiller/core/distilled_page_prefs_android.h b/components/dom_distiller/core/distilled_page_prefs_android.h
index baf7398065f37a8c5039dd7b28ebf5b836d1cb4b..6f0b1c8d8dfc692f8a86c059113bd0b746cd9de6 100644
--- a/components/dom_distiller/core/distilled_page_prefs_android.h
+++ b/components/dom_distiller/core/distilled_page_prefs_android.h
@@ -17,11 +17,13 @@ class DistilledPagePrefsAndroid {
  public:
   DistilledPagePrefsAndroid(JNIEnv* env,
                             jobject obj,
-                            DistilledPagePrefs* distillerPagePrefsPtr);
+                            DistilledPagePrefs* distilled_page_prefs_ptr);
   virtual ~DistilledPagePrefsAndroid();
   static bool Register(JNIEnv* env);
   void SetTheme(JNIEnv* env, jobject obj, jint theme);
   jint GetTheme(JNIEnv* env, jobject obj);
+  void AddObserver(JNIEnv* env, jobject obj, jlong obs);
+  void RemoveObserver(JNIEnv* env, jobject obj, jlong obs);
 
  private:
   DistilledPagePrefs* distilled_page_prefs_;
@@ -29,6 +31,20 @@ class DistilledPagePrefsAndroid {
   DISALLOW_COPY_AND_ASSIGN(DistilledPagePrefsAndroid);
 };
 
+class DistilledPagePrefsObserverAndroid : public DistilledPagePrefs::Observer {
+ public:
+  DistilledPagePrefsObserverAndroid(JNIEnv* env, jobject obj);
+  virtual ~DistilledPagePrefsObserverAndroid();
+
+  // DistilledPagePrefs::Observer implementation.
+  virtual void OnChangeTheme(DistilledPagePrefs::Theme new_theme) OVERRIDE;
+
+  virtual void DestroyObserverAndroid(JNIEnv* env, jobject obj);
+
+ private:
+  base::android::ScopedJavaGlobalRef<jobject> java_ref_;
+};
+
 }  // namespace android
 }  // namespace dom_distiller