Load the resources for max scale factor first.

ui/base/layout.cc

Index: ui/base/layout.cc
diff --git a/ui/base/layout.cc b/ui/base/layout.cc
index 6fef499542c57632fb6afc58a7d821309ce5d193..674f76f079b7ceecb9fa0aad953a3f68784d7889 100644
--- a/ui/base/layout.cc
+++ b/ui/base/layout.cc
@@ -64,7 +64,7 @@ bool UseTouchOptimizedUI() {
 }
 #endif  // defined(OS_WIN)
 
-const float kScaleFactorScales[] = {1.0f, 1.4f, 1.8f, 2.0f};
+const float kScaleFactorScales[] = {1.0f, 1.0f, 1.4f, 1.8f, 2.0f};
 COMPILE_ASSERT(NUM_SCALE_FACTORS == arraysize(kScaleFactorScales),
                kScaleFactorScales_incorrect_size);
 const size_t kScaleFactorScalesLength = arraysize(kScaleFactorScales);
@@ -134,6 +134,7 @@ ScaleFactor GetScaleFactorFromScale(float scale) {
       smallest_diff = diff;
     }
   }
+  DCHECK_NE(closest_match, SCALE_FACTOR_NONE);
   return closest_match;
 }