[CrOS Tether] Make BluetoothThrottler a singleton which can be easily shared between EasyUnlock and…

chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.h

 // 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_EXTENSIONS_API_EASY_UNLOCK_PRIVATE_EASY_UNLOCK_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_EASY_UNLOCK_PRIVATE_EASY_UNLOCK_PRIVATE_API_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 10 matching lines @@
 
 namespace base {
 class Timer;
 }
 
 namespace content {
 class BrowserContext;
 }
 
 namespace cryptauth {
-class BluetoothThrottler;
 class Connection;
 class ExternalDeviceInfo;
 class SecureMessageDelegate;
 }
 
 namespace proximity_auth {
 class BluetoothLowEnergyConnectionFinder;
 }
 
 namespace extensions {
@@ skipping 437 matching lines @@
   // service was found.
   void OnConnectionFound(std::unique_ptr<cryptauth::Connection> connection);
 
   // Callback when waiting for |connection_finder_| to return.
   void OnConnectionFinderTimedOut();
 
   // The BLE connection finder instance.
   std::unique_ptr<proximity_auth::BluetoothLowEnergyConnectionFinder>
       connection_finder_;
 
-  // The connection throttler passed to the BLE connection finder.
-  std::unique_ptr<cryptauth::BluetoothThrottler> bluetooth_throttler_;
-
   // Used for timing out when waiting for the connection finder to return.
   std::unique_ptr<base::Timer> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockPrivateFindSetupConnectionFunction);
 };
 
 class EasyUnlockPrivateSetupConnectionStatusFunction
     : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("easyUnlockPrivate.setupConnectionStatus",
@@ skipping 55 matching lines @@
   // ExtensionFunction:
   ResponseAction Run() override;
 
   DISALLOW_COPY_AND_ASSIGN(
       EasyUnlockPrivateSetupConnectionGetDeviceAddressFunction);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_EASY_UNLOCK_PRIVATE_EASY_UNLOCK_PRIVATE_API_H_