Added support for image notifications.

chrome/browser/ui/views/ash/balloon_view_ash.cc

Index: chrome/browser/ui/views/ash/balloon_view_ash.cc
diff --git a/chrome/browser/ui/views/ash/balloon_view_ash.cc b/chrome/browser/ui/views/ash/balloon_view_ash.cc
index 0f50a5b77c732ae7e1666c02d96a09f06f544285..ec57d60bde137cf2186da12d536731f11880e3fd 100644
--- a/chrome/browser/ui/views/ash/balloon_view_ash.cc
+++ b/chrome/browser/ui/views/ash/balloon_view_ash.cc
@@ -166,6 +166,11 @@ void BalloonViewAsh::SetNotificationIcon(const std::string& id,
   GetMessageCenter()->SetNotificationPrimaryIcon(id, image);
 }
 
+void BalloonViewAsh::SetNotificationImage(const std::string& id,
+                                          const gfx::ImageSkia& image) {
+  GetMessageCenter()->SetNotificationImage(id, image);
+}
+
 void BalloonViewAsh::DownloadImages(const Notification& notification) {
   // Cancel any previous downloads.
   downloads_.clear();
@@ -180,4 +185,19 @@ void BalloonViewAsh::DownloadImages(const Notification& notification) {
           base::Bind(&BalloonViewAsh::SetNotificationIcon,
                      base::Unretained(this), notification.notification_id()))));
   }
+
+  // Start a download for the notification's image if appropriate.
+  const base::DictionaryValue* optional_fields = notification.optional_fields();
+  if (optional_fields &&
+      optional_fields->HasKey(ui::notifications::kImageUrlKey)) {
+    string16 url;
+    optional_fields->GetString(ui::notifications::kImageUrlKey, &url);
+    if (!url.empty()) {
+      downloads_.push_back(linked_ptr<ImageDownload>(new ImageDownload(
+          notification, GURL(url),
+          message_center::kNotificationPreferredImageSize,
+          base::Bind(&BalloonViewAsh::SetNotificationImage,
+                     base::Unretained(this), notification.notification_id()))));
+    }
+  }
 }