[Smart Lock] Add a private API to show an error bubble anchored to the Smart Lock app window.

chrome/browser/ui/views/proximity_auth/proximity_auth_error_bubble_view.h

Index: chrome/browser/ui/views/proximity_auth/proximity_auth_error_bubble_view.h
diff --git a/chrome/browser/ui/views/proximity_auth/proximity_auth_error_bubble_view.h b/chrome/browser/ui/views/proximity_auth/proximity_auth_error_bubble_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..58af2d7e9416b8cd7e3aac3a1db67f95363aea24
--- /dev/null
+++ b/chrome/browser/ui/views/proximity_auth/proximity_auth_error_bubble_view.h
@@ -0,0 +1,53 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_PROXIMITY_AUTH_PROXIMITY_AUTH_ERROR_BUBBLE_VIEW_H_
+#define CHROME_BROWSER_UI_VIEWS_PROXIMITY_AUTH_PROXIMITY_AUTH_ERROR_BUBBLE_VIEW_H_
+
+#include "base/macros.h"
+#include "base/strings/string16.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "ui/views/bubble/bubble_delegate.h"
+#include "ui/views/controls/styled_label_listener.h"
+#include "url/gurl.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace gfx {
+class Range;
+class Rect;
+}
+
+class ProximityAuthErrorBubbleView : public content::WebContentsObserver,

[Tim Song, 2015/01/15 19:29:24]

Do you need to implement content::WebContentsObserver? You don't seem to be
overriding any functions from it.

[Ilya Sherman, 2015/01/16 05:39:42]

I call web_contents(), which is null when the WebContents is being destroyed. 
This prevents a possible race condition.

+                                     public views::BubbleDelegateView,
+                                     public views::StyledLabelListener {
+ public:
+  // Shows an error bubble with the given |message|, with an arrow pointing to
+  // the |anchor_rect|. If the |link_range| is non-empty, then that range of the
+  // |message| is drawn as a link with |link_url| as the target. When the link
+  // is clicked, the target URL opens in a new tab off of the given
+  // |web_contents|.
+  ProximityAuthErrorBubbleView(const base::string16& message,
+                               const gfx::Range& link_range,
+                               const GURL& link_url,
+                               const gfx::Rect& anchor_rect,
+                               content::WebContents* web_contents);
+
+ private:
+  ~ProximityAuthErrorBubbleView() override;
+
+  // StyledLabelListener:
+  void StyledLabelLinkClicked(const gfx::Range& range,
+                              int event_flags) override;
+
+  // The target URL of the link shown in the bubble's error message. Ignored if
+  // there is no link.
+  const GURL link_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProximityAuthErrorBubbleView);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_PROXIMITY_AUTH_PROXIMITY_AUTH_ERROR_BUBBLE_VIEW_H_