3 files changed, 10 insertions, 3 deletions
diff --git a/chrome/browser/resources/new_new_tab.html b/chrome/browser/resources/new_new_tab.html
index e306dd8..23e8e24 100644
--- a/chrome/browser/resources/new_new_tab.html
+++ b/chrome/browser/resources/new_new_tab.html
@@ -5,7 +5,8 @@
   hasattribution:hasattribution;
   anim:anim;
   syncispresent:syncispresent;
-  customlogo:customlogo">
+  customlogo:customlogo"
+  install-animation-enabled="true">
 <head>
 <meta charset="utf-8">
 <title i18n-content="title"></title>
diff --git a/chrome/browser/resources/ntp/apps.css b/chrome/browser/resources/ntp/apps.css
index 58f544a..a199154 100644
--- a/chrome/browser/resources/ntp/apps.css
+++ b/chrome/browser/resources/ntp/apps.css
@@ -81,11 +81,11 @@
   }
 }
 
-.app[new=new] {
+html[install-animation-enabled=true] .app[new=new] {
   opacity: 0;
 }
 
-.app[new=installed] {
+html[install-animation-enabled=true] .app[new=installed] {
   -webkit-animation: bounce .5s ease-in-out;
   -webkit-transition: opacity .5s;
 }
diff --git a/chrome/browser/resources/ntp/apps.js b/chrome/browser/resources/ntp/apps.js
index 057ca6a..d9098d5 100644
--- a/chrome/browser/resources/ntp/apps.js
+++ b/chrome/browser/resources/ntp/apps.js
@@ -165,6 +165,12 @@ var apps = (function() {
         }, 500);
         div.addEventListener('webkitAnimationEnd', function(e) {
           div.removeAttribute('new');
+
+          // If we get new data (eg because something installs in another tab,
+          // or because we uninstall something here), don't run the install
+          // animation again.
+          document.documentElement.setAttribute("install-animation-enabled",
+                                                "false");
         });
         if ($('apps').classList.contains('hidden'))
           toggleSectionVisibilityAndAnimate('APPS');