Cross-process frames should be notified of device scale factor changes.

content/browser/renderer_host/render_widget_host_view_mus.cc

Index: content/browser/renderer_host/render_widget_host_view_mus.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_mus.cc b/content/browser/renderer_host/render_widget_host_view_mus.cc
index 1603db8ca310f99ea5ccd5727c0e0217ce875f56..f0297a485b94b339dec0287cdf380c0114dc7852 100644
--- a/content/browser/renderer_host/render_widget_host_view_mus.cc
+++ b/content/browser/renderer_host/render_widget_host_view_mus.cc
@@ -22,10 +22,6 @@
 #include "ui/aura/window.h"
 #include "ui/base/hit_test.h"
 
-namespace blink {
-struct WebScreenInfo;
-}
-
 namespace content {
 
 RenderWidgetHostViewMus::RenderWidgetHostViewMus(ui::Window* parent_window,
@@ -253,10 +249,6 @@ void RenderWidgetHostViewMus::UnlockMouse() {
   // TODO(fsamuel): Implement mouse lock in Mus.
 }
 
-void RenderWidgetHostViewMus::GetScreenInfo(blink::WebScreenInfo* results) {
-  // TODO(fsamuel): Populate screen info from Mus.
-}
-
 gfx::Rect RenderWidgetHostViewMus::GetBoundsInRootWindow() {
   aura::Window* top_level = aura_window_->GetToplevelWindow();
   gfx::Rect bounds(top_level->GetBoundsInScreen());