Add a histogram for tracking web store promo

chrome/browser/resources/ntp/apps.js

Index: chrome/browser/resources/ntp/apps.js
diff --git a/chrome/browser/resources/ntp/apps.js b/chrome/browser/resources/ntp/apps.js
index 81d7eb0624569050c58f00ba3e3c70a1875cc3ab..c728d835a0864397733018cc49aa435e54fa8fa8 100644
--- a/chrome/browser/resources/ntp/apps.js
+++ b/chrome/browser/resources/ntp/apps.js
@@ -18,7 +18,7 @@ function getAppsCallback(data) {
   appsSectionContent.textContent = '';
 
   data.apps.sort(function(a,b) {
-    return a.app_launch_index - b.app_launch_index
+    return a.app_launch_index - b.app_launch_index;
   });
 
   clearClosedMenu(apps.menu);
@@ -124,6 +124,13 @@ var apps = (function() {
     chrome.send('launchApp', [appId,
                               String(left), String(top),
                               String(width), String(height)]);
+
+    chrome.send('recordAppLaunch', [appId]);

[Aaron Boodman, 2010/11/10 20:38:00]

It seems it would be safer to send 'recordAppLaunch' first. The way it is, I
worry about 'recordAppLaunch' getting dropped since 'launchApp' results in
navigating the tab.

+  }
+
+  function recordAppLaunch(e) {
+    var appId = e.currentTarget.getAttribute('app-id');
+    chrome.send('recordAppLaunch', [appId]);
   }
 
   /**
@@ -232,6 +239,7 @@ var apps = (function() {
       var a = div.firstChild;
 
       a.onclick = handleClick;
+      a.onmousedown = handleIfMiddleClick(recordAppLaunch);
       a.style.backgroundImage = url(app['icon_big']);
       if (hashParams['app-id'] == app['id']) {
         div.setAttribute('new', 'new');
@@ -271,6 +279,7 @@ var apps = (function() {
       a.textContent = app['name'];
       a.href = app['launch_url'];
       a.onclick = handleClick;
+      a.onmousedown = handleIfMiddleClick(recordAppLaunch);
       a.style.backgroundImage = url(app['icon_small']);
       a.className = 'item';
       span.appendChild(a);
@@ -286,6 +295,7 @@ var apps = (function() {
       a.textContent = app['name'];
       a.href = app['launch_url'];
       a.onclick = handleClick;
+      a.onmousedown = handleIfMiddleClick(recordAppLaunch);
       a.style.backgroundImage = url(app['icon_small']);
       a.className = 'item';
       return a;
@@ -297,6 +307,9 @@ var apps = (function() {
         'name': localStrings.getString('web_store_title'),
         'launch_url': localStrings.getString('web_store_url')
       });
+      var link = elm.querySelector('a');
+      link.onclick = recordAppLaunch;
+      link.onmousedown = handleIfMiddleClick(recordAppLaunch);
       elm.setAttribute('app-id', 'web-store-entry');
       return elm;
     }