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

content/browser/renderer_host/render_view_host_impl.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 29 matching lines @@
 
 namespace content {
 
 class PageState;
 class RenderWidgetHostDelegate;
 class SessionStorageNamespace;
 struct FileChooserFileInfo;
 struct FileChooserParams;
 struct FrameReplicationState;
 
+#if defined(OS_WIN)
+class OnScreenKeyboardObserver;
+#endif
+
 // This implements the RenderViewHost interface that is exposed to
 // embedders of content, and adds things only visible to content.
 //
 // The exact API of this object needs to be more thoroughly designed. Right
 // now it mimics what WebContentsImpl exposed, which is a fairly large API and
 // may contain things that are not relevant to a common subset of views. See
 // also the comment in render_view_host_delegate.h about the size and scope of
 // the delegate API.
 //
 // Right now, the concept of page navigation (both top level and frame) exists
@@ skipping 341 matching lines @@
 
   // This is updated every time UpdateWebkitPreferences is called. That method
   // is in turn called when any of the settings change that the WebPreferences
   // values depend on.
   std::unique_ptr<WebPreferences> web_preferences_;
 
   bool updating_web_preferences_;
 
   bool render_view_ready_on_process_launch_;
 
+#if defined(OS_WIN)
+  std::unique_ptr<OnScreenKeyboardObserver> keyboard_observer_;
+#endif
+
   base::WeakPtrFactory<RenderViewHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_