Bug 784759 - Move database creation out of startup on firstrun. r=mfinkle

mobile/android/chrome/content/browser.js

@@ -283,8 +283,18 @@ var BrowserApp = {
       this.restoreSession(false, null);
     }
 
-    if (updated)
-      this.onAppUpdated();
+    if (updated) {
+        // creating the form history and passwords databases can be expensive
+        // delay it until after the first page has loaded
+        let browser = BrowserApp.selectedTab.browser;
+        let updatedFun = function updatedFun() {
+            browser.removeEventListener("DOMContentLoaded", updatedFun, false);
+            // initialize the form history and passwords databases on upgrades
+            Services.obs.notifyObservers(null, "FormHistory:Init", "");
+            Services.obs.notifyObservers(null, "Passwords:Init", "");
+        }
+        browser.addEventListener("DOMContentLoaded", updatedFun, false);
+    }
 
     // notify java that gecko has loaded
     sendMessageToJava({
@@ -487,12 +497,6 @@ var BrowserApp = {
       });
   },
 
-  onAppUpdated: function() {
-    // initialize the form history and passwords databases on upgrades
-    Services.obs.notifyObservers(null, "FormHistory:Init", "");
-    Services.obs.notifyObservers(null, "Passwords:Init", "");
-  },
-
   shutdown: function shutdown() {
     NativeWindow.uninit();
     SelectionHandler.uninit();