Support sideloaded fonts via command line option for blink layout_tests

content/shell/common/webkit_test_helpers.h

Index: content/shell/common/webkit_test_helpers.h
diff --git a/content/shell/common/webkit_test_helpers.h b/content/shell/common/webkit_test_helpers.h
index 0d4593facd0384251491934aee88ade0aa3ea24e..ffdbb2de2e5ca394d3fb4382c23ac294534ea3e8 100644
--- a/content/shell/common/webkit_test_helpers.h
+++ b/content/shell/common/webkit_test_helpers.h
@@ -5,6 +5,9 @@
 #ifndef CONTENT_SHELL_COMMON_WEBKIT_TEST_HELPERS_H_
 #define CONTENT_SHELL_COMMON_WEBKIT_TEST_HELPERS_H_
 
+#include <string>
+#include <vector>
+
 struct WebPreferences;
 
 namespace base {
@@ -30,6 +33,9 @@ void ApplyLayoutTestDefaultPreferences(WebPreferences* prefs);
 // Returns the root of the Blink checkout.
 base::FilePath GetWebKitRootDirFilePath();
 
+// Returns list of extra font files to be made accessible to the renderer.
+std::vector<std::string> GetSideloadFontFiles();
+
 }  // namespace content
 
 #endif  // CONTENT_SHELL_COMMON_WEBKIT_TEST_HELPERS_H_