Add GetDisplayWithDisplayId to display::Screen.

chrome/browser/ui/window_sizer/window_sizer_common_unittest.cc

Index: chrome/browser/ui/window_sizer/window_sizer_common_unittest.cc
diff --git a/chrome/browser/ui/window_sizer/window_sizer_common_unittest.cc b/chrome/browser/ui/window_sizer/window_sizer_common_unittest.cc
index 9a53eb8f00b3e5edc8351e50b23ce167c9205d1c..68938eaf7821762ca6640564104a98aa522bf6a6 100644
--- a/chrome/browser/ui/window_sizer/window_sizer_common_unittest.cc
+++ b/chrome/browser/ui/window_sizer/window_sizer_common_unittest.cc
@@ -61,6 +61,17 @@ class TestScreen : public display::Screen {
     return displays_;
   }
 
+  bool GetDisplayWithDisplayId(int64_t display_id,
+                               display::Display* display) const override {
+    for (const display::Display& display_in_list : displays_) {
+      if (display_in_list.id() == display_id) {
+        *display = display_in_list;
+        return true;
+      }
+    }
+    return false;
+  }
+
   display::Display GetDisplayNearestWindow(
       gfx::NativeView view) const override {
 #if defined(USE_AURA)