Add GetDisplayWithDisplayId to display::Screen.

extensions/shell/browser/shell_screen.cc

Index: extensions/shell/browser/shell_screen.cc
diff --git a/extensions/shell/browser/shell_screen.cc b/extensions/shell/browser/shell_screen.cc
index 157750871cc0da29202df01f27b197327e5555dc..b7542f8820d27d829817f0319d9f3b9a293932c2 100644
--- a/extensions/shell/browser/shell_screen.cc
+++ b/extensions/shell/browser/shell_screen.cc
@@ -79,6 +79,15 @@ std::vector<display::Display> ShellScreen::GetAllDisplays() const {
   return std::vector<display::Display>(1, display_);
 }
 
+bool ShellScreen::GetDisplayWithDisplayId(int64_t display_id,
+                                          display::Display* display) const {
+  if (display_.id() == display_id) {
+    *display = display_;
+    return true;
+  }
+  return false;
+}
+
 display::Display ShellScreen::GetDisplayNearestWindow(
     gfx::NativeWindow window) const {
   return display_;