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..6aa394bac456af26147853fa7a3c0588bcb960ba 100644
--- a/ui/views/accessibility/native_view_accessibility_auralinux.cc
+++ b/ui/views/accessibility/native_view_accessibility_auralinux.cc
@@ -95,6 +95,11 @@ class AuraLinuxApplication
     return gfx::Vector2d();
   }
 
+  gfx::Rect GetScreenBoundsRect() const override {
+    NOTREACHED();
+    return gfx::Rect(0, 0, 0, 0);
+  }
+
   gfx::NativeViewAccessible HitTestSync(int x, int y) override {
     return nullptr;
   }