Add 'title' field to DownloadUIItem and thread through bridges to OfflinePageDownloadItem.

chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc

Index: chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc
diff --git a/chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc b/chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc
index a99688924993a3784e749a2552230bdfe8954bf3..2030056800e27d87453c2ad43fee3bbf12287df3 100644
--- a/chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc
+++ b/chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc
@@ -25,6 +25,7 @@
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
+using base::android::ConvertUTF16ToJavaString;
 using base::android::JavaParamRef;
 using base::android::ScopedJavaGlobalRef;
 using base::android::ScopedJavaLocalRef;
@@ -42,6 +43,7 @@ void ToJavaOfflinePageDownloadItemList(
     Java_OfflinePageDownloadBridge_createDownloadItemAndAddToList(
         env, j_result_obj, ConvertUTF8ToJavaString(env, item->guid),
         ConvertUTF8ToJavaString(env, item->url.spec()),
+        ConvertUTF16ToJavaString(env, item->title),
         ConvertUTF8ToJavaString(env, item->target_path.value()),
         item->start_time.ToJavaTime(), item->total_bytes);
   }
@@ -53,6 +55,7 @@ ScopedJavaLocalRef<jobject> ToJavaOfflinePageDownloadItem(
   return Java_OfflinePageDownloadBridge_createDownloadItem(
       env, ConvertUTF8ToJavaString(env, item.guid),
       ConvertUTF8ToJavaString(env, item.url.spec()),
+      ConvertUTF16ToJavaString(env, item.title),
       ConvertUTF8ToJavaString(env, item.target_path.value()),
       item.start_time.ToJavaTime(), item.total_bytes);
 }