Updates Zoom bubble layout and adds +/- buttons

chrome/browser/ui/views/location_bar/location_bar_view.cc

Index: chrome/browser/ui/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.cc b/chrome/browser/ui/views/location_bar/location_bar_view.cc
index 284f8672adcee772b35cd6d0e4879e2190544d6c..cb11482a00ad1c30938e716471742118aac47949 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.cc
@@ -320,9 +320,15 @@ void LocationBarView::ZoomChangedForActiveTab(bool can_show_bubble) {
   }
 
   WebContents* web_contents = GetWebContents();
-  if (can_show_bubble && zoom_view_->visible() && web_contents)
+  // Zoom bubble may be present without its corresponding decoration
+  // |zoom_view_| such as when using + or - buttons in the bubble to
+  // set the zoom to 100%. When either is visible, show or update the
+  // bubble contents.
+  if (can_show_bubble && web_contents &&
+      (zoom_view_->visible() || ZoomBubbleView::GetZoomBubble())) {
     ZoomBubbleView::ShowBubble(web_contents, gfx::Point(),
                                ZoomBubbleView::AUTOMATIC);
+  }
 }
 
 void LocationBarView::SetStarToggled(bool on) {