Use the source display's pixel size as a mirror window's size.

ash/display/root_window_transformers_unittest.cc

 // Copyright (c) 2013 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"ash/ash_root_window_transformer.h"
+#include "ash/display/root_window_transformers.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_manager.h"
 #include "ash/launcher/launcher.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 268 matching lines @@
   MagnificationController* magnifier =
       Shell::GetInstance()->magnification_controller();
 
   magnifier->SetEnabled(true);
   EXPECT_FLOAT_EQ(2.0f, magnifier->GetScale());
   magnifier->SetScale(2.5f, false);
   EXPECT_FLOAT_EQ(2.5f, magnifier->GetScale());
   generator.PressMoveAndReleaseTouchTo(50, 50);
   // Default test touches have radius_x/y = 1.0, with device scale
   // factor = 2, the scaled radius_x/y should be 0.5.
-  EXPECT_FLOAT_EQ(0.2, event_handler.touch_radius_x());
-  EXPECT_FLOAT_EQ(0.2, event_handler.touch_radius_y());
+  EXPECT_FLOAT_EQ(0.2f, event_handler.touch_radius_x());
+  EXPECT_FLOAT_EQ(0.2f, event_handler.touch_radius_y());
 
   generator.ScrollSequence(gfx::Point(0,0),
                            base::TimeDelta::FromMilliseconds(100),
                            10.0, 1.0, 5, 1);
 
   // With device scale factor = 2, ordinal_offset * 2 = offset.
   EXPECT_FLOAT_EQ(event_handler.scroll_x_offset(),
                   event_handler.scroll_x_offset_ordinal() * 2 * 2.5f);
   EXPECT_FLOAT_EQ(event_handler.scroll_y_offset(),
                   event_handler.scroll_y_offset_ordinal() * 2 * 2.5f);
@@ skipping 83 matching lines @@
   EXPECT_EQ("159,99", event_handler.GetLocationAndReset());
 
   magnifier->SetEnabled(false);
   EXPECT_FLOAT_EQ(1.0f, magnifier->GetScale());
 
   Shell::GetInstance()->RemovePreTargetHandler(&event_handler);
 }
 
 }  // namespace test
 }  // namespace ash