chromeos: Move removable media path constant to header.

Move the file manager kRemovableMediaPath constant to a
header so it can be used by tests.

BUG=633243

Review-Url: https://codereview.chromium.org/2582143002
Cr-Commit-Position: refs/heads/master@{#439401}

chrome/browser/chromeos/file_manager/path_util.cc

@@ -4,7 +4,6 @@
 
 #include "chrome/browser/chromeos/file_manager/path_util.h"
 
-#include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/sys_info.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
@@ -27,13 +26,14 @@ const char kDownloadsFolderName[] = "Downloads";
 
 constexpr base::FilePath::CharType kArcDownloadPath[] =
     FILE_PATH_LITERAL("/sdcard/Download");
-constexpr base::FilePath::CharType kRemovableMediaPath[] =
-    FILE_PATH_LITERAL("/media/removable");
 constexpr char kArcRemovableMediaProviderUrl[] =
     "content://org.chromium.arc.removablemediaprovider/";
 
 }  // namespace
 
+const base::FilePath::CharType kRemovableMediaPath[] =
+    FILE_PATH_LITERAL("/media/removable");
+
 base::FilePath GetDownloadsFolderForProfile(Profile* profile) {
   // On non-ChromeOS system (test+development), the primary profile uses
   // $HOME/Downloads for ease for accessing local files for debugging.

chrome/browser/chromeos/file_manager/path_util.h

@@ -7,16 +7,18 @@
 
 #include <string>
 
+#include "base/files/file_path.h"
+
 class GURL;
 class Profile;
 
-namespace base {
-class FilePath;
-}
-
 namespace file_manager {
 namespace util {
 
+// Absolute base path for removable media on Chrome OS. Exposed here so it can
+// be used by tests.
+extern const base::FilePath::CharType kRemovableMediaPath[];
+
 // Gets the absolute path for the 'Downloads' folder for the |profile|.
 base::FilePath GetDownloadsFolderForProfile(Profile* profile);