[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

Index: chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.h
diff --git a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.h b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.h
index 91416507356b0cd0553b706c7b6c26f3ead6bee2..c81dd4bc4701a2094e0867e9ff080f323670028f 100644
--- a/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.h
+++ b/chrome/browser/extensions/api/easy_unlock_private/easy_unlock_private_api.h
@@ -28,7 +28,6 @@ class BrowserContext;
 }
 
 namespace cryptauth {
-class BluetoothThrottler;
 class Connection;
 class ExternalDeviceInfo;
 class SecureMessageDelegate;
@@ -486,9 +485,6 @@ class EasyUnlockPrivateFindSetupConnectionFunction
   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_;