Reland: Move TouchSelectionController from content to ui

ui/touch_selection/ui_touch_selection_export.h

Index: ui/touch_selection/ui_touch_selection_export.h
diff --git a/ui/touch_selection/ui_touch_selection_export.h b/ui/touch_selection/ui_touch_selection_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1f80bbcccf73d49dac670fab22f9cb942593849
--- /dev/null
+++ b/ui/touch_selection/ui_touch_selection_export.h
@@ -0,0 +1,37 @@
+// Copyright 2014 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_TOUCH_SELECTION_UI_TOUCH_SELECTION_EXPORT_H_
+#define UI_TOUCH_SELECTION_UI_TOUCH_SELECTION_EXPORT_H_
+
+// Defines UI_TOUCH_SELECTION_EXPORT so that functionality implemented by the UI
+// touch selection module can be exported to consumers.
+
+#if defined(COMPONENT_BUILD)
+
+#if defined(WIN32)
+
+#if defined(UI_TOUCH_SELECTION_IMPLEMENTATION)
+#define UI_TOUCH_SELECTION_EXPORT __declspec(dllexport)
+#else
+#define UI_TOUCH_SELECTION_EXPORT __declspec(dllimport)
+#endif
+
+#else  // !defined(WIN32)
+
+#if defined(UI_TOUCH_SELECTION_IMPLEMENTATION)
+#define UI_TOUCH_SELECTION_EXPORT __attribute__((visibility("default")))
+#else
+#define UI_TOUCH_SELECTION_EXPORT
+#endif
+
+#endif
+
+#else  // !defined(COMPONENT_BUILD)
+
+#define UI_TOUCH_SELECTION_EXPORT
+
+#endif
+
+#endif  // UI_TOUCH_SELECTION_UI_TOUCH_SELECTION_EXPORT_H_