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

chrome/browser/resources/signin/signin_error/signin_error.js

Index: chrome/browser/resources/signin/signin_error/signin_error.js
diff --git a/chrome/browser/resources/signin/signin_error/signin_error.js b/chrome/browser/resources/signin/signin_error/signin_error.js
index 0abdaa28604ddb80363444357019ef4b5753c66b..749c99bc03866f9e69ef3baba0627de4db8b3ef6 100644
--- a/chrome/browser/resources/signin/signin_error/signin_error.js
+++ b/chrome/browser/resources/signin/signin_error/signin_error.js
@@ -14,7 +14,11 @@ cr.define('signin.error', function() {
     if (loadTimeData.getBoolean('isSystemProfile')) {
       $('learnMoreLink').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 onKeyDown(e) {