Make MountPointProvider pluggable from outside webkit/fileapi

webkit/fileapi/isolated_mount_point_provider.cc

Index: webkit/fileapi/isolated_mount_point_provider.cc
diff --git a/webkit/fileapi/isolated_mount_point_provider.cc b/webkit/fileapi/isolated_mount_point_provider.cc
index 3dc57acb17c260a128d7ba93c41d40578ee82450..ddbff29ac1a65239f2d61ce81fa91bae9c16f829 100644
--- a/webkit/fileapi/isolated_mount_point_provider.cc
+++ b/webkit/fileapi/isolated_mount_point_provider.cc
@@ -55,6 +55,23 @@ IsolatedMountPointProvider::IsolatedMountPointProvider(
 IsolatedMountPointProvider::~IsolatedMountPointProvider() {
 }
 
+bool IsolatedMountPointProvider::CanHandleType(FileSystemType type) const {
+  switch (type) {
+    case kFileSystemTypeIsolated:
+    case kFileSystemTypeDragged:
+    case kFileSystemTypeNativeMedia:
+    case kFileSystemTypeDeviceMedia:
+      return true;
+#if !defined(OS_CHROMEOS)
+    case kFileSystemTypeNativeLocal:
+    case kFileSystemTypeNativeForPlatformApp:
+      return true;
+#endif
+    default:
+      return false;
+  }
+}
+
 void IsolatedMountPointProvider::ValidateFileSystemRoot(
     const GURL& origin_url,
     FileSystemType type,