Break dependency of chrome.gyp:common on content.gyp:content_browser.

components/policy/policy_export.h

Index: components/policy/policy_export.h
diff --git a/components/policy/policy_export.h b/components/policy/policy_export.h
index 47376acaa855769d8e8c02412f6e927627931518..b6030aa17874707e343f8eab06e27beaa273db51 100644
--- a/components/policy/policy_export.h
+++ b/components/policy/policy_export.h
@@ -6,24 +6,29 @@
 #define COMPONENTS_POLICY_POLICY_EXPORT_H_
 
 #if defined(COMPONENT_BUILD)
+
 #if defined(WIN32)
 
 #if defined(POLICY_COMPONENT_IMPLEMENTATION)
 #define POLICY_EXPORT __declspec(dllexport)
 #else
 #define POLICY_EXPORT __declspec(dllimport)
-#endif  // defined(BASE_PREFS_IMPLEMENTATION)
+#endif  // defined(POLICY_COMPONENT_IMPLEMENTATION)
 
 #else  // defined(WIN32)
+
 #if defined(POLICY_COMPONENT_IMPLEMENTATION)
 #define POLICY_EXPORT __attribute__((visibility("default")))
 #else
 #define POLICY_EXPORT
-#endif
-#endif
+#endif  // defined(POLICY_COMPONENT_IMPLEMENTATION)
+
+#endif  // defined(WIN32)
 
 #else  // defined(COMPONENT_BUILD)
+
 #define POLICY_EXPORT
-#endif
+
+#endif  // defined(COMPONENT_BUILD)
 
 #endif  // COMPONENTS_POLICY_POLICY_EXPORT_H_