Remove synchronous GetDisplays() and Configure() from NativeDisplayDelegate

ui/display/chromeos/test/test_native_display_delegate.h

Index: ui/display/chromeos/test/test_native_display_delegate.h
diff --git a/ui/display/chromeos/test/test_native_display_delegate.h b/ui/display/chromeos/test/test_native_display_delegate.h
index 02fd4d4298379b879356c0c7f2a9960416eae746..eac789e197804f8f6c9a20ca5c8c2da1950d4430 100644
--- a/ui/display/chromeos/test/test_native_display_delegate.h
+++ b/ui/display/chromeos/test/test_native_display_delegate.h
@@ -48,12 +48,8 @@ class TestNativeDisplayDelegate : public NativeDisplayDelegate {
   void SyncWithServer() override;
   void SetBackgroundColor(uint32_t color_argb) override;
   void ForceDPMSOn() override;
-  std::vector<DisplaySnapshot*> GetDisplays() override;
   void GetDisplays(const GetDisplaysCallback& callback) override;
   void AddMode(const DisplaySnapshot& output, const DisplayMode* mode) override;
-  bool Configure(const DisplaySnapshot& output,
-                 const DisplayMode* mode,
-                 const gfx::Point& origin) override;
   void Configure(const DisplaySnapshot& output,
                  const DisplayMode* mode,
                  const gfx::Point& origin,
@@ -70,6 +66,10 @@ class TestNativeDisplayDelegate : public NativeDisplayDelegate {
   void RemoveObserver(NativeDisplayObserver* observer) override;
 
  private:
+  bool Configure(const DisplaySnapshot& output,
+                 const DisplayMode* mode,
+                 const gfx::Point& origin);
+
   // Outputs to be returned by GetDisplays().
   std::vector<DisplaySnapshot*> outputs_;