extensions: don't animate options dialog when loading.

chrome/browser/resources/extensions/extension_options_overlay.js

Index: chrome/browser/resources/extensions/extension_options_overlay.js
diff --git a/chrome/browser/resources/extensions/extension_options_overlay.js b/chrome/browser/resources/extensions/extension_options_overlay.js
index 174e16e63cf2ffb05e315595228c149519c6b1fe..cc62605a0ed2e89debd1909004502a107fe1ff5e 100644
--- a/chrome/browser/resources/extensions/extension_options_overlay.js
+++ b/chrome/browser/resources/extensions/extension_options_overlay.js
@@ -121,9 +121,10 @@ cr.define('extensions', function() {
         // the overlay. It is calculated by multiplying the pythagorean distance
         // between old and the new size (in px) with a constant speed of
         // 0.25 ms/px.
-        var animationTime = 0.25 * Math.sqrt(
-            Math.pow(newWidth - oldWidth, 2) +
-            Math.pow(newHeight - oldHeight, 2));
+        var loading = document.documentElement.classlist.contains('loading');

[Dan Beam, 2015/02/04 19:09:30]

note: this doesn't work all that well but will when hcarmona@ or I fix the
constant rebuild issues

+        var animationTime = loading ? 0 :
+            0.25 * Math.sqrt(Math.pow(newWidth - oldWidth, 2) +
+                             Math.pow(newHeight - oldHeight, 2));
 
         if (animation) {
           animation.cancel();