Move discardable memory to //components from //content

components/discardable_memory/common/discardable_memory_export.h

Index: components/discardable_memory/common/discardable_memory_export.h
diff --git a/components/discardable_memory/common/discardable_memory_export.h b/components/discardable_memory/common/discardable_memory_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..32942538b01b5f0b587dd3a294e2e36b5b69e14b
--- /dev/null
+++ b/components/discardable_memory/common/discardable_memory_export.h
@@ -0,0 +1,29 @@
+// Copyright (c) 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.
+
+#ifndef COMPONENTS_DISCARDABLE_MEMORY_COMMON_DISCARDABLE_MEMORY_EXPORT_H_
+#define COMPONENTS_DISCARDABLE_MEMORY_COMMON_DISCARDABLE_MEMORY_EXPORT_H_
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(DISCARDABLE_MEMORY_IMPLEMENTATION)
+#define DISCARDABLE_MEMORY_EXPORT __declspec(dllexport)
+#else
+#define DISCARDABLE_MEMORY_EXPORT __declspec(dllimport)
+#endif  // defined(DISCARDABLE_MEMORY_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(DISCARDABLE_MEMORY_IMPLEMENTATION)
+#define DISCARDABLE_MEMORY_EXPORT __attribute__((visibility("default")))
+#else
+#define DISCARDABLE_MEMORY_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define DISCARDABLE_MEMORY_EXPORT
+#endif
+
+#endif  // COMPONENTS_DISCARDABLE_MEMORY_COMMON_DISCARDABLE_MEMORY_EXPORT_H_