Make tab/tabstrip high density compatible

ui/base/ui_base_switches.cc

Index: ui/base/ui_base_switches.cc
diff --git a/ui/base/ui_base_switches.cc b/ui/base/ui_base_switches.cc
index b4c1ca34f97063c0153bcfb9340bc4dfc5309df2..33cff9f0c978f90e9f55ec29f5c9a8caf718929b 100644
--- a/ui/base/ui_base_switches.cc
+++ b/ui/base/ui_base_switches.cc
@@ -6,6 +6,11 @@
 
 namespace switches {
 
+// Whether or not ImageSkiaOperations methods can scale one of images
+// if they don't have the same scale factor.
+const char kDisableScalingInImageSkiaOperations[] =
+    "disable-scaling-in-image-skia-operations";
+
 // Let text glyphs have X-positions that aren't snapped to the pixel grid.
 const char kEnableTextSubpixelPositioning[] =
     "enable-text-subpixel-positioning";