Adding BLE connection finder unit tests.

Adds unit tests for the proximity_auth::BluetoothLowEnergyConnectionFinder
class.

BUG=485123

Review URL: https://codereview.chromium.org/1129983004

Cr-Commit-Position: refs/heads/master@{#330918}

components/components_tests.gyp

@@ -428,6 +428,7 @@
       'precache/core/precache_url_table_unittest.cc',
     ],
     'proximity_auth_unittest_sources': [
+      'proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc',
       'proximity_auth/bluetooth_connection_finder_unittest.cc',
       'proximity_auth/bluetooth_connection_unittest.cc',
       'proximity_auth/bluetooth_throttler_impl_unittest.cc',

components/proximity_auth/BUILD.gn

@@ -67,6 +67,7 @@ source_set("unit_tests") {
 
   deps = [
     ":proximity_auth",
+    "ble:unit_tests",
     "cryptauth:unit_tests",
     "logging:unit_tests",
     "//base/test:test_support",

components/proximity_auth/ble/BUILD.gn

@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//testing/test.gni")
+
 source_set("ble") {
   sources = [
     "bluetooth_low_energy_connection.cc",
@@ -21,3 +23,21 @@ source_set("ble") {
     "//net",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "bluetooth_low_energy_connection_finder_unittest.cc",
+  ]
+
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
+  deps = [
+    ":ble",
+    "//components/proximity_auth",
+    "//base/test:test_support",
+    "//device/bluetooth:mocks",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+}

components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h

@@ -48,7 +48,6 @@ class BluetoothLowEnergyConnectionFinder
                                  Connection::Status old_status,
                                  Connection::Status new_status) override;
 
- protected:
   // device::BluetoothAdapter::Observer:
   void DeviceAdded(device::BluetoothAdapter* adapter,
                    device::BluetoothDevice* device) override;
@@ -57,6 +56,12 @@ class BluetoothLowEnergyConnectionFinder
   void DeviceRemoved(device::BluetoothAdapter* adapter,
                      device::BluetoothDevice* device) override;
 
+ protected:
+  // Creates a proximity_auth::Connection based on |gatt_connection|. Exposed
+  // for testing.
+  virtual scoped_ptr<Connection> CreateConnection(
+      scoped_ptr<device::BluetoothGattConnection> gatt_connection);
+
  private:
   // Callback to be called when the Bluetooth adapter is initialized.
   void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
@@ -100,10 +105,6 @@ class BluetoothLowEnergyConnectionFinder
   // be called once the connection is established.
   void CreateGattConnection(device::BluetoothDevice* remote_device);
 
-  // Creates a connection with |remote_device|.
-  scoped_ptr<Connection> CreateConnection(
-      scoped_ptr<device::BluetoothGattConnection> gatt_connection);
-
   // The uuid of the service it looks for to establish a GattConnection.
   device::BluetoothUUID remote_service_uuid_;