Load the resources for max scale factor first.

ui/base/layout.h

 // 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.
 
 #ifndef UI_BASE_LAYOUT_H_
 #define UI_BASE_LAYOUT_H_
 
 #include <vector>
 
 #include "build/build_config.h"
@@ skipping 14 matching lines @@
   LAYOUT_TOUCH,
 };
 
 // Returns the display layout that should be used.  This could be used
 // e.g. to tweak hard-coded padding that's layout specific, or choose
 // the .pak file of theme resources to load.
 UI_EXPORT DisplayLayout GetDisplayLayout();
 
 // Supported UI scale factors for the platform. This is used as an index
 // into the array |kScaleFactorScales| which maps the enum value to a float.
+// SCALE_FACTOR_NONE is used for density independent resources such as
+// string, html/js files or an image that can be used for any scales

[pkotwicz, 2012/11/07 06:40:44]

Nit: /any scale/all scale factors/g

[oshima, 2012/11/07 22:35:30]

Done.

+// (such as wallpapers).
 enum ScaleFactor {
-  SCALE_FACTOR_100P = 0,
+  SCALE_FACTOR_NONE = 0,
+  SCALE_FACTOR_100P,
 
   // The scale factor used for unscaled binary data, the 1x (default) scale
   // factor data packs.

[pkotwicz, 2012/11/07 06:40:44]

Nit: remove the comment above as it is stale

[oshima, 2012/11/07 22:35:30]

Done.

-  SCALE_FACTOR_NONE = SCALE_FACTOR_100P,
   SCALE_FACTOR_140P,
   SCALE_FACTOR_180P,
   SCALE_FACTOR_200P,
 
   NUM_SCALE_FACTORS  // This always appears last.
 };
 
 // Returns the float scale value for |scale_factor|.
 UI_EXPORT float GetScaleFactorScale(ScaleFactor scale_factor);
 
 // Returns the supported ScaleFactor which most closely matches |scale|.
 // Converting from float to ScaleFactor is inefficient and should be done as
 // little as possible.
+// TODO(oshima): Make ScaleFactor a class and remove this.
 UI_EXPORT ScaleFactor GetScaleFactorFromScale(float scale);
 
 // Returns the ScaleFactor used by |view|.
 UI_EXPORT ScaleFactor GetScaleFactorForNativeView(gfx::NativeView view);
 
 // Returns the maximum device scale factor supported by this platform.
 UI_EXPORT ScaleFactor GetMaxScaleFactor();
 
 // Returns a vector with the scale factors which are supported by this
 // platform, in ascending order.
 UI_EXPORT std::vector<ScaleFactor> GetSupportedScaleFactors();
 
 // Returns true if |scale_factor| is supported by this platform.
 UI_EXPORT bool IsScaleFactorSupported(ScaleFactor scale_factor);
 
 namespace test {
 
 UI_EXPORT void SetSupportedScaleFactors(
     const std::vector<ScaleFactor>& scale_factors);
 
 }  // namespace test
 
 }  // namespace ui
 
 #endif  // UI_BASE_LAYOUT_H_