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

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index d54b2d7d57322c2ff413483ae9fe0fb8ae766c1d..e5bcb01324b016a79d6c5e6969fb89c998d6f70c 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -47,6 +47,10 @@ 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.
 //
@@ -408,6 +412,10 @@ class CONTENT_EXPORT RenderViewHostImpl : public RenderViewHost,
 
   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);