Modified OverviewMode's LabelButton bounds to cover the entire item.

ui/views/controls/button/label_button.h

Index: ui/views/controls/button/label_button.h
diff --git a/ui/views/controls/button/label_button.h b/ui/views/controls/button/label_button.h
index 2efd5b11f7d273e19eba4cdc95bbac37e5f4eee5..11bdb667e11020781d74c05c97cf277e279485d2 100644
--- a/ui/views/controls/button/label_button.h
+++ b/ui/views/controls/button/label_button.h
@@ -85,6 +85,12 @@ class VIEWS_EXPORT LabelButton : public CustomButton,
   void SetFocusPainter(scoped_ptr<Painter> focus_painter);
   Painter* focus_painter() { return focus_painter_.get(); }
 
+  // Set whether the label should ignore the vertical overlap with the border.
+  // Default is true.
+  void set_ignore_vertical_overlap(bool ignore_vertical_overlap) {
+    ignore_vertical_overlap_ = ignore_vertical_overlap;
+  }
+
   // View:
   void SetBorder(scoped_ptr<Border> border) override;
   gfx::Size GetPreferredSize() const override;
@@ -191,6 +197,9 @@ class VIEWS_EXPORT LabelButton : public CustomButton,
   // Spacing between the image and the text.
   int image_label_spacing_;
 
+  // Indicates if the label should ignore the vertical overlap with the border.
+  bool ignore_vertical_overlap_;
+
   scoped_ptr<Painter> focus_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(LabelButton);