Make it possible to set the display mode from Chromium

content/browser/renderer_host/render_view_host_delegate.h

Index: content/browser/renderer_host/render_view_host_delegate.h
diff --git a/content/browser/renderer_host/render_view_host_delegate.h b/content/browser/renderer_host/render_view_host_delegate.h
index 2697e5e790699efa4e1ca6218414c0cb8160eb60..21d8a337452bdc35d1e69f9347f5e7e59dd7a398 100644
--- a/content/browser/renderer_host/render_view_host_delegate.h
+++ b/content/browser/renderer_host/render_view_host_delegate.h
@@ -14,6 +14,7 @@
 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
 #include "content/common/content_export.h"
 #include "net/base/load_states.h"
+#include "third_party/WebKit/public/platform/WebDisplayMode.h"
 #include "third_party/WebKit/public/web/WebPopupType.h"
 #include "ui/base/window_open_disposition.h"
 
@@ -175,6 +176,9 @@ class CONTENT_EXPORT RenderViewHostDelegate {
   // Returns whether the associated tab is in fullscreen mode.
   virtual bool IsFullscreenForCurrentTab() const;
 
+  // Returns the display mode for the view.
+  virtual blink::WebDisplayMode GetDisplayMode() const;
+
   // The contents' preferred size changed.
   virtual void UpdatePreferredSize(const gfx::Size& pref_size) {}