Implement a bluetooth picker dialog for Android

content/public/browser/bluetooth_chooser.h

 // Copyright 2015 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 CONTENT_PUBLIC_BROWSER_BLUETOOTH_CHOOSER_H_
 #define CONTENT_PUBLIC_BROWSER_BLUETOOTH_CHOOSER_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/web_contents.h"
 
 namespace content {
 
 // Represents a way to ask the user to select a Bluetooth device from a list of
 // options.
 class CONTENT_EXPORT BluetoothChooser {
  public:
   enum class Event {
     // The user cancelled the chooser instead of selecting a device.
     CANCELLED,
     // The user selected device |opt_device_id|.
     SELECTED,
+    // The user asked for a new Bluetooth discovery session to start.
+    RESCAN,
 
     // As the dialog implementations grow more user-visible buttons and knobs,
     // we'll add enumerators here to support them.
   };
 
   // Chooser implementations are constructed with an |EventHandler| and report
   // user interaction with the chooser through it. |opt_device_id| is an empty
   // string except for Event::SELECTED.
   //
   // The EventHandler won't be called after the chooser object is destroyed.
@@ skipping 17 matching lines @@
   enum class DiscoveryState { FAILED_TO_START, DISCOVERING, IDLE };
   virtual void ShowDiscoveryState(DiscoveryState state) {}
 
   // Shows a new device in the chooser.
   virtual void AddDevice(const std::string& device_id,
                          const base::string16& device_name) {}
 
   // Tells the chooser that a device is no longer available. The chooser should
   // not call DeviceSelected() for a device that's been removed.
   virtual void RemoveDevice(const std::string& device_id) {}
+
+  // Show various help links for the dialog.
+  void ShowOverviewLink(content::WebContents* web_contents);

[Jeffrey Yasskin, 2015/09/01 17:09:49]

Can you add these in a separate CL so we don't need to get jam to re-review this
one?

He told me not to put implementation in content/public, which these are, so he
may want us to add an Event enumerator to ask the BluetoothDispatcherHost to
show the links.

[Finnur, 2015/09/02 16:01:43]

Shifted this over to BluetoothDispatcherHost. :)

+  void ShowPairingLink(content::WebContents* web_contents);
+  void ShowAdapterOffLink(content::WebContents* web_contents);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BLUETOOTH_CHOOSER_H_