Views/a11y: Only tag Views AX_STATE_FOCUSABLE if IsAccessibilityFocusable().

ui/views/accessibility/native_view_accessibility_unittest.cc

Index: ui/views/accessibility/native_view_accessibility_unittest.cc
diff --git a/ui/views/accessibility/native_view_accessibility_unittest.cc b/ui/views/accessibility/native_view_accessibility_unittest.cc
index 4fd1b1e545b6b833381cbc3f80993f2329890cac..c75ae19e1d3ce103c3c77b5b02647d47da023cb0 100644
--- a/ui/views/accessibility/native_view_accessibility_unittest.cc
+++ b/ui/views/accessibility/native_view_accessibility_unittest.cc
@@ -101,6 +101,10 @@ TEST_F(NativeViewAccessibilityTest, WritableFocus) {
   EXPECT_TRUE(button_accessibility_->SetFocused(false));
   EXPECT_EQ(nullptr, button_->GetFocusManager()->GetFocusedView());
   EXPECT_EQ(nullptr, button_accessibility_->GetFocus());
+
+  // If not focusable at all, SetFocused() should return false.
+  button_->SetEnabled(false);
+  EXPECT_FALSE(button_accessibility_->SetFocused(true));
 }
 
 // Subclass of NativeViewAccessibility that destroys itself when its