Moves LowMemoryObserver into chromeos and renames

chromeos/memory/chromeos_memory_export.h

Index: chromeos/memory/chromeos_memory_export.h
diff --git a/components/sessions/sessions_export.h b/chromeos/memory/chromeos_memory_export.h
similarity index 42%
copy from components/sessions/sessions_export.h
copy to chromeos/memory/chromeos_memory_export.h
index 66ac82270bca30d13eef066610534c539875c57a..5c0e641513409d9082a761b580d90fd2ad429b80 100644
--- a/components/sessions/sessions_export.h
+++ b/chromeos/memory/chromeos_memory_export.h
@@ -2,28 +2,28 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SESSIONS_SESSIONS_EXPORT_H_
-#define COMPONENTS_SESSIONS_SESSIONS_EXPORT_H_
+#ifndef CHROMEOS_MEMORY_CHROMEOS_MEMORY_EXPORT_H_
+#define CHROMEOS_MEMORY_CHROMEOS_MEMORY_EXPORT_H_
 
 #if defined(COMPONENT_BUILD)
 #if defined(WIN32)
 
-#if defined(SESSIONS_IMPLEMENTATION)
-#define SESSIONS_EXPORT __declspec(dllexport)
+#if defined(CHROMEOS_MEMORY_IMPLEMENTATION)
+#define CHROMEOS_MEMORY_EXPORT __declspec(dllexport)
 #else
-#define SESSIONS_EXPORT __declspec(dllimport)
+#define CHROMEOS_MEMORY_EXPORT __declspec(dllimport)
 #endif  // defined(BASE_PREFS_IMPLEMENTATION)
 
 #else  // defined(WIN32)
-#if defined(SESSIONS_IMPLEMENTATION)
-#define SESSIONS_EXPORT __attribute__((visibility("default")))
+#if defined(CHROMEOS_MEMORY_IMPLEMENTATION)
+#define CHROMEOS_MEMORY_EXPORT __attribute__((visibility("default")))
 #else
-#define SESSIONS_EXPORT
+#define CHROMEOS_MEMORY_EXPORT
 #endif
 #endif
 
 #else  // defined(COMPONENT_BUILD)
-#define SESSIONS_EXPORT
+#define CHROMEOS_MEMORY_EXPORT
 #endif
 
-#endif  // COMPONENTS_SESSIONS_SESSIONS_EXPORT_H_
+#endif  // CHROMEOS_MEMORY_CHROMEOS_MEMORY_EXPORT_H_