The on screen keyboard on Windows 8+ should not obscure the input field.

ui/base/win/osk_display_observer.h

Index: ui/base/win/osk_display_observer.h
diff --git a/ui/base/win/osk_display_observer.h b/ui/base/win/osk_display_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..989ae77c6866641da7d6756a179c0973cc6a550b
--- /dev/null
+++ b/ui/base/win/osk_display_observer.h
@@ -0,0 +1,24 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_BASE_WIN_OSK_OBSERVER_H_
+#define UI_BASE_WIN_OSK_OBSERVER_H_
+
+namespace ui {
+
+// Implemented by classes who wish to get notified about the on screen keyboard
+// becoming visible/hidden.
+class UI_BASE_EXPORT OnScreenKeyboardObserver {
+ public:
+  virtual ~OnScreenKeyboardObserver() {}

[ananta, 2016/05/23 19:32:07]

Could not make this protected as per your previous review comment as it gives a
compile error
while allocating the derived class WinScreenKeyboardObserver

+
+  // The |keyboard_rect| parameter contains the bounds of the keyboard in
+  // pixels.
+  virtual void OnKeyboardVisible(const gfx::Rect& keyboard_rect_in_pixels) {}
+  virtual void OnKeyboardHidden(const gfx::Rect& keyboard_rect_in_pixels) {}
+};
+
+}  // namespace ui
+
+#endif  // UI_BASE_WIN_OSK_OBSERVER_H_