Support sideloaded fonts via command line option for blink layout_tests

content/shell/common/webkit_test_helpers.cc

Index: content/shell/common/webkit_test_helpers.cc
diff --git a/content/shell/common/webkit_test_helpers.cc b/content/shell/common/webkit_test_helpers.cc
index d2c1ea1df3e831eba5b8e96d8b8c59dc383925a4..5c0cf3d1136816afc914a9fee35f261aa529542d 100644
--- a/content/shell/common/webkit_test_helpers.cc
+++ b/content/shell/common/webkit_test_helpers.cc
@@ -7,6 +7,7 @@
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
+#include "base/strings/string_split.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/common/content_switches.h"
 #include "content/shell/common/shell_switches.h"
@@ -118,4 +119,16 @@ base::FilePath GetWebKitRootDirFilePath() {
   return base_path.Append(FILE_PATH_LITERAL("third_party/WebKit"));
 }
 
+std::vector<std::string> GetSideloadFontFiles() {
+  std::vector<std::string> files;
+  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kRegisterFontFiles)) {
+    base::SplitString(
+        command_line.GetSwitchValueASCII(switches::kRegisterFontFiles),
+        ';',
+        &files);
+  }
+  return files;
+}
+
 }  // namespace content