Make MountPointProvider pluggable from outside webkit/fileapi

webkit/fileapi/sandbox_mount_point_provider.cc

Index: webkit/fileapi/sandbox_mount_point_provider.cc
diff --git a/webkit/fileapi/sandbox_mount_point_provider.cc b/webkit/fileapi/sandbox_mount_point_provider.cc
index 93f574b8ec30cb11b1191ccccdc901c6872869ff..9d65b49952f520b59f56f25cef898748fa37f080 100644
--- a/webkit/fileapi/sandbox_mount_point_provider.cc
+++ b/webkit/fileapi/sandbox_mount_point_provider.cc
@@ -131,7 +131,7 @@ SandboxMountPointProvider::kFileSystemDirectory[] =
     FILE_PATH_LITERAL("File System");
 
 // static
-bool SandboxMountPointProvider::CanHandleType(FileSystemType type) {
+bool SandboxMountPointProvider::IsSandboxType(FileSystemType type) {
   return type == kFileSystemTypeTemporary ||
          type == kFileSystemTypePersistent ||
          type == kFileSystemTypeSyncable;
@@ -188,6 +188,10 @@ SandboxMountPointProvider::~SandboxMountPointProvider() {
   }
 }
 
+bool SandboxMountPointProvider::CanHandleType(FileSystemType type) const {
+  return IsSandboxType(type);
+}
+
 void SandboxMountPointProvider::ValidateFileSystemRoot(
     const GURL& origin_url, fileapi::FileSystemType type, bool create,
     const ValidateFileSystemCallback& callback) {