Magnifier border is now more visible on light backgrounds.

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

Index: ash/common/system/chromeos/palette/tools/magnifier_mode.cc
diff --git a/ash/common/system/chromeos/palette/tools/magnifier_mode.cc b/ash/common/system/chromeos/palette/tools/magnifier_mode.cc
new file mode 100644
index 0000000000000000000000000000000000000000..83b7ece6a4d688ef3fe25735ffe27f8cd057f4c7
--- /dev/null
+++ b/ash/common/system/chromeos/palette/tools/magnifier_mode.cc
@@ -0,0 +1,51 @@
+// Copyright 2016 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 "ash/common/system/chromeos/palette/tools/magnifier_mode.h"
+
+#include "ash/common/palette_delegate.h"
+#include "ash/common/system/chromeos/palette/palette_ids.h"
+#include "ash/common/wm_shell.h"
+#include "grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace ash {
+
+MagnifierMode::MagnifierMode(Delegate* delegate)
+    : CommonPaletteTool(delegate) {}
+
+MagnifierMode::~MagnifierMode() {}
+
+PaletteGroup MagnifierMode::GetGroup() const {
+  return PaletteGroup::MODE;
+}
+
+PaletteToolId MagnifierMode::GetToolId() const {
+  return PaletteToolId::MAGNIFY;
+}
+
+gfx::VectorIconId MagnifierMode::GetActiveTrayIcon() {
+  return gfx::VectorIconId::PALETTE_TRAY_ICON_MAGNIFY;
+}
+
+void MagnifierMode::OnEnable() {
+  CommonPaletteTool::OnEnable();
+  WmShell::Get()->palette_delegate()->SetPartialMagnifierState(true);
+}
+
+void MagnifierMode::OnDisable() {
+  CommonPaletteTool::OnDisable();
+  WmShell::Get()->palette_delegate()->SetPartialMagnifierState(false);
+}
+
+views::View* MagnifierMode::CreateView() {
+  return CreateDefaultView(
+      l10n_util::GetStringUTF16(IDS_ASH_PALETTE_MAGNIFIER_MODE));
+}
+
+gfx::VectorIconId MagnifierMode::GetPaletteIconId() {
+  return gfx::VectorIconId::PALETTE_MODE_MAGNIFY;
+}
+
+}  // namespace ash