Move a bunch of ash-only vector icons to ash/.

ash/common/system/chromeos/palette/tools/magnifier_mode.h

Index: ash/common/system/chromeos/palette/tools/magnifier_mode.h
diff --git a/ash/common/system/chromeos/palette/tools/magnifier_mode.h b/ash/common/system/chromeos/palette/tools/magnifier_mode.h
index 0aa6764b28b2be1a80db9c36d477c56d7ef60ef7..334f8289d81190eeb7d1ae9eb63c96e7eb12dce6 100644
--- a/ash/common/system/chromeos/palette/tools/magnifier_mode.h
+++ b/ash/common/system/chromeos/palette/tools/magnifier_mode.h
@@ -20,13 +20,13 @@ class MagnifierMode : public CommonPaletteTool {
   // PaletteTool overrides.
   PaletteGroup GetGroup() const override;
   PaletteToolId GetToolId() const override;
-  gfx::VectorIconId GetActiveTrayIcon() override;
+  const gfx::VectorIcon& GetActiveTrayIcon() const override;
   void OnEnable() override;
   void OnDisable() override;
   views::View* CreateView() override;
 
   // CommonPaletteTool overrides.
-  gfx::VectorIconId GetPaletteIconId() override;
+  const gfx::VectorIcon& GetPaletteIcon() const override;
 
   DISALLOW_COPY_AND_ASSIGN(MagnifierMode);
 };