Fix TabTest.HitTestTopPixel on non-refresh

BUG=874793
R=pkasting

Change-Id: I594189d310393c86bae4d8f4839b3ffcd43e220b
Reviewed-on: https://chromium-review.googlesource.com/1179276
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583926}

chrome/browser/ui/views/tabs/tab_unittest.cc

@@ -80,7 +80,9 @@ class FakeTabController : public TabController {
       gfx::Path* clip) override {
     return true;
   }
-  int GetStrokeThickness() const override { return 0; }
+  int GetStrokeThickness() const override {
+    return ui::MaterialDesignController::IsRefreshUi() ? 0 : 1;
+  }
   bool CanPaintThrobberToLayer() const override {
     return paint_throbber_to_layer_;
   }