Cleanup: Merge device/udev_linux/udev.{cc,h} into device/udev_linux/scoped_udev.h.

components/storage_monitor/udev_util_linux.h

Index: components/storage_monitor/udev_util_linux.h
diff --git a/components/storage_monitor/udev_util_linux.h b/components/storage_monitor/udev_util_linux.h
index f00048b09cf8d9990bff38173a74b4fd13394678..76b59add9fabf2b851fa0117b8c15930399943ab 100644
--- a/components/storage_monitor/udev_util_linux.h
+++ b/components/storage_monitor/udev_util_linux.h
@@ -5,12 +5,12 @@
 #ifndef COMPONENTS_STORAGE_MONITOR_UDEV_UTIL_LINUX_H_
 #define COMPONENTS_STORAGE_MONITOR_UDEV_UTIL_LINUX_H_
 
-#include <libudev.h>
-
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 
+struct udev_device;
+
 namespace base {
 class FilePath;
 }
@@ -19,7 +19,7 @@ namespace storage_monitor {
 
 // Wrapper function for udev_device_get_property_value() that also checks for
 // valid but empty values.
-std::string GetUdevDevicePropertyValue(struct udev_device* udev_device,
+std::string GetUdevDevicePropertyValue(udev_device* udev_device,
                                        const char* key);
 
 // Helper for udev_device_new_from_syspath()/udev_device_get_property_value()