Refactor fake Connection subclasses in proximity_auth/ tests to a single file.

components/proximity_auth/bluetooth_throttler_impl_unittest.cc

 // 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.
 
 #include "components/proximity_auth/bluetooth_throttler_impl.h"
 
 #include "base/test/simple_test_tick_clock.h"
 #include "base/time/time.h"
+#include "components/proximity_auth/fake_connection.h"
 #include "components/proximity_auth/wire_message.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace proximity_auth {
 namespace {
 
-class StubConnection : public Connection {
- public:
-  StubConnection() : Connection(RemoteDevice()) {}
-  ~StubConnection() override {}
-
-  void Connect() override {}
-  void Disconnect() override {}
-  void SendMessageImpl(scoped_ptr<WireMessage> message) override {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(StubConnection);
-};
-
 class TestBluetoothThrottler : public BluetoothThrottlerImpl {
  public:
   explicit TestBluetoothThrottler(scoped_ptr<base::TickClock> clock)
       : BluetoothThrottlerImpl(clock.Pass()) {}
   ~TestBluetoothThrottler() override {}
 
   // Increase visibility for testing.
   using BluetoothThrottlerImpl::GetCooldownTimeDelta;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestBluetoothThrottler);
 };
 
 }  // namespace
 
 class ProximityAuthBluetoothThrottlerImplTest : public testing::Test {
  public:
   ProximityAuthBluetoothThrottlerImplTest()
       : clock_(new base::SimpleTestTickClock),
         throttler_(make_scoped_ptr(clock_)) {
     // The throttler treats null times as special, so start with a non-null
     // time.
     clock_->Advance(base::TimeDelta::FromSeconds(1));
   }
 
   void PerformConnectionStateTransition(Connection::Status old_status,
                                         Connection::Status new_status) {
-    StubConnection connection;
+    FakeConnection connection((RemoteDevice()));
     throttler_.OnConnection(&connection);
     static_cast<ConnectionObserver*>(&throttler_)
         ->OnConnectionStatusChanged(&connection, old_status, new_status);
   }
 
  protected:
   // The clock is owned by the |throttler_|.
   base::SimpleTestTickClock* clock_;
   TestBluetoothThrottler throttler_;
 };
@@ skipping 34 matching lines @@
        GetDelay_DelayedConnectionAfterInProgressDisconnectIsNotThrottled) {
   // Simulate an attempt to connect (in progress connection) followed by a
   // disconnection, then allow the cooldown period to elapse.
   PerformConnectionStateTransition(Connection::IN_PROGRESS,
                                    Connection::DISCONNECTED);
   clock_->Advance(throttler_.GetCooldownTimeDelta());
   EXPECT_EQ(base::TimeDelta(), throttler_.GetDelay());
 }
 
 }  // namespace proximity_auth