Fix layout of the sync and sign-in error dialogs when the page zoom is increased.

chrome/browser/resources/signin/sync_confirmation/sync_confirmation.js

Index: chrome/browser/resources/signin/sync_confirmation/sync_confirmation.js
diff --git a/chrome/browser/resources/signin/sync_confirmation/sync_confirmation.js b/chrome/browser/resources/signin/sync_confirmation/sync_confirmation.js
index 0a08712507f0ef9fdba0307f56219c7fa46a114f..1f51ec8fdb43010694e0794f4dd1b3f3207a0f8b 100644
--- a/chrome/browser/resources/signin/sync_confirmation/sync_confirmation.js
+++ b/chrome/browser/resources/signin/sync_confirmation/sync_confirmation.js
@@ -28,7 +28,11 @@ cr.define('sync.confirmation', function() {
     } else {
       $('syncConfirmationDetails').hidden = true;
     }
-    chrome.send('initializedWithSize', [document.body.scrollHeight]);
+
+    // Prefer using |document.body.offsetHeight| instead of
+    // |document.body.scrollHeight| as it returns the correct height of the
+    // even when the page zoom in Chrome is different than 100%.
+    chrome.send('initializedWithSize', [document.body.offsetHeight]);
   }
 
   function clearFocus() {