[DeviceLight] Add Layout support

content/shell/renderer/test_runner/test_runner.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 CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_RUNNER_H_
 #define CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_RUNNER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 261 matching lines @@
   // all tests that rely on this... well, unfortunate behavior. See
   // http://crbug.com/309760 for the plan.
   void UseUnfortunateSynchronousResizeMode();
 
   bool EnableAutoResizeMode(int min_width,
                             int min_height,
                             int max_width,
                             int max_height);
   bool DisableAutoResizeMode(int new_width, int new_height);
 
+  void SetMockDeviceLight(double value);
   // Device Motion / Device Orientation related functions
   void SetMockDeviceMotion(bool has_acceleration_x, double acceleration_x,
                            bool has_acceleration_y, double acceleration_y,
                            bool has_acceleration_z, double acceleration_z,
                            bool has_acceleration_including_gravity_x,
                            double acceleration_including_gravity_x,
                            bool has_acceleration_including_gravity_y,
                            double acceleration_including_gravity_y,
                            bool has_acceleration_including_gravity_z,
                            double acceleration_including_gravity_z,
@@ skipping 461 matching lines @@
   bool use_mock_theme_;
 
   base::WeakPtrFactory<TestRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestRunner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_TEST_RUNNER_H_