Load the resources for max scale factor first.

ui/base/layout_unittest.cc

 // Copyright (c) 2012 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 "ui/base/layout.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_CHROMEOS)
 #include "base/chromeos/chromeos_version.h"
@@ skipping 54 matching lines @@
   EXPECT_EQ(SCALE_FACTOR_200P, GetScaleFactorFromScale(1.91f));
   EXPECT_EQ(SCALE_FACTOR_200P, GetScaleFactorFromScale(2.0f));
   EXPECT_EQ(SCALE_FACTOR_200P, GetScaleFactorFromScale(2.1f));
   EXPECT_EQ(SCALE_FACTOR_200P, GetScaleFactorFromScale(999.0f));
 
   test::SetSupportedScaleFactors(original_supported_factors);
 }
 
 TEST(LayoutTest, GetMaxScaleFactor) {
 #if defined(OS_CHROMEOS)
-  // On Chrome OS, the maximum scale factor differs depending on the devices and
-  // force-device-scale-factor flag. Tests only the cases not affected by these.
-  if (!base::chromeos::IsRunningOnChromeOS() &&
-      !CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kForceDeviceScaleFactor))
-    EXPECT_EQ(SCALE_FACTOR_100P, GetMaxScaleFactor());
+  // On Chrome OS, the maximum scale factor is based on
+  // the available resource pack. In testing environment,
+  // we always have 200P.
+  EXPECT_EQ(SCALE_FACTOR_200P, GetMaxScaleFactor());
 #else
   std::vector<ScaleFactor> original_supported_factors =
       GetSupportedScaleFactors();
   {
     ScaleFactor scale_factors[] = { SCALE_FACTOR_100P };
     std::vector<ScaleFactor> supported_factors(
         scale_factors, scale_factors + arraysize(scale_factors));
     test::SetSupportedScaleFactors(supported_factors);
     EXPECT_EQ(SCALE_FACTOR_100P, GetMaxScaleFactor());
   }
@@ skipping 15 matching lines @@
     std::vector<ScaleFactor> supported_factors(
         scale_factors, scale_factors + arraysize(scale_factors));
     test::SetSupportedScaleFactors(supported_factors);
     EXPECT_EQ(SCALE_FACTOR_200P, GetMaxScaleFactor());
   }
   test::SetSupportedScaleFactors(original_supported_factors);
 #endif
 }
 
 }  // namespace ui