Exporting ScopedTempDir so it can be used by webkit layout tests.

webkit/support/webkit_support.h

Index: webkit/support/webkit_support.h
diff --git a/webkit/support/webkit_support.h b/webkit/support/webkit_support.h
index 2482c87d240e08a5a36d135ff0810fdd34b453e0..d11f09b2c1c709110b969d70c01bed9716bf3b62 100644
--- a/webkit/support/webkit_support.h
+++ b/webkit/support/webkit_support.h
@@ -154,6 +154,16 @@ bool SetCurrentDirectoryForFileURL(const WebKit::WebURL& fileUrl);
 // Convert a file:/// URL to a base64 encoded data: URL.
 WebKit::WebURL LocalFileToDataURL(const WebKit::WebURL& fileUrl);
 
+// Scoped temporary directories for use by webkit layout tests.
+class ScopedTempDirectory {
+ public:
+  virtual ~ScopedTempDirectory() {}
+  virtual bool CreateUniqueTempDir() = 0;
+  virtual std::string path() const = 0;
+};
+
+ScopedTempDirectory* CreateScopedTempDirectory();
+
 // -------- Time
 int64 GetCurrentTimeInMillisecond();