Disable VK overscroll for login/out-of-box.

chrome/browser/chromeos/login/helper.h

Index: chrome/browser/chromeos/login/helper.h
diff --git a/chrome/browser/chromeos/login/helper.h b/chrome/browser/chromeos/login/helper.h
index c813eb2ebc9521d7e0023fa6e2981818cb9c4a89..2337c7d2acfdcce529bf855112eb99494f0332fb 100644
--- a/chrome/browser/chromeos/login/helper.h
+++ b/chrome/browser/chromeos/login/helper.h
@@ -44,6 +44,10 @@ const int kMaxUserImageSize = 512;
 // @ symbol.
 std::string CanonicalizeUserID(const std::string& user_id);
 
+// Returns true if login should scroll user pods into view itself when virtual
+// keyboard is shown and disable vk overscroll.
+bool LoginScrollIntoViewEnabled();
+
 // A helper class for easily mocking out Network*Handler calls for tests.
 class NetworkStateHelper {
  public: