[MD] Remove arrow from location bar bubbles when icon is already showing

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/location_bar/location_bar_bubble_delegate_view.h"
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/exclusive_access/fullscreen_controller.h"
 #include "content/public/browser/notification_source.h"
+#include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/geometry/rect.h"
 
 LocationBarBubbleDelegateView::LocationBarBubbleDelegateView(
     views::View* anchor_view,
     content::WebContents* web_contents)
     : BubbleDelegateView(anchor_view,
                          anchor_view ? views::BubbleBorder::TOP_RIGHT
                                      : views::BubbleBorder::NONE) {
   // Add observer to close the bubble if the fullscreen state changes.
   if (web_contents) {
     Browser* browser = chrome::FindBrowserWithWebContents(web_contents);
     registrar_.Add(
         this, chrome::NOTIFICATION_FULLSCREEN_CHANGED,
         content::Source<FullscreenController>(
             browser->exclusive_access_manager()->fullscreen_controller()));
   }
 }
 
 LocationBarBubbleDelegateView::~LocationBarBubbleDelegateView() {}
 
 void LocationBarBubbleDelegateView::ShowForReason(DisplayReason reason) {
   if (reason == USER_GESTURE) {
-    // TODO(estade): re-enable this when crbug.com/518941 is fixed.
-    // SetArrowPaintType(views::BubbleBorder::PAINT_TRANSPARENT);
+    if (ui::MaterialDesignController::IsModeMaterial())

[Peter Kasting, 2016/03/03 20:43:28]

Nit: I'd add a comment here, e.g. "Gesture-triggered bubbles will have a hover
state visible on the target icon, so we don't need (or want) to show the arrow."

[Evan Stade, 2016/03/03 21:07:59]

Done.

+      SetArrowPaintType(views::BubbleBorder::PAINT_TRANSPARENT);
     GetWidget()->Show();
   } else {
     GetWidget()->ShowInactive();
   }
 }
 
 void LocationBarBubbleDelegateView::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
@@ skipping 13 matching lines @@
   if (GetAnchorView())
     return;
 
   const int kBubblePaddingFromScreenEdge = 20;
   int horizontal_offset = width() / 2 + kBubblePaddingFromScreenEdge;
   const int x_pos = base::i18n::IsRTL()
                         ? (screen_bounds.x() + horizontal_offset)
                         : (screen_bounds.right() - horizontal_offset);
   SetAnchorRect(gfx::Rect(x_pos, screen_bounds.y(), 0, 0));
 }