Add GetScreenBoundsRect to ui::AXPlatformNodeDelegate

ui/views/accessibility/native_view_accessibility_auralinux.cc

Index: ui/views/accessibility/native_view_accessibility_auralinux.cc
diff --git a/ui/views/accessibility/native_view_accessibility_auralinux.cc b/ui/views/accessibility/native_view_accessibility_auralinux.cc
index 49d82ab8c2c82c227d4c36fc8a5723bc4c330b85..be4fca63883d56ec61b0f92b37d55bf3fd6d020d 100644
--- a/ui/views/accessibility/native_view_accessibility_auralinux.cc
+++ b/ui/views/accessibility/native_view_accessibility_auralinux.cc
@@ -91,8 +91,9 @@ class AuraLinuxApplication
     return widget->GetRootView()->GetNativeViewAccessible();
   }
 
-  gfx::Vector2d GetGlobalCoordinateOffset() override {
-    return gfx::Vector2d();
+  gfx::Rect GetScreenBoundsRect() const override {
+    NOTREACHED();
+    return gfx::Rect(0, 0, 0, 0);
   }
 
   gfx::NativeViewAccessible HitTestSync(int x, int y) override {