Infrastructure for reading V8's initial snapshot from external files

gin/test/file_runner.cc

Index: gin/test/file_runner.cc
diff --git a/gin/test/file_runner.cc b/gin/test/file_runner.cc
index 83228d6d014e5570a63847f149dca2df58941b07..b639d0640630e8821cb01ccd330b15e1eed8396f 100644
--- a/gin/test/file_runner.cc
+++ b/gin/test/file_runner.cc
@@ -19,6 +19,10 @@
 #include "gin/try_catch.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+#include "gin/public/isolate_holder.h"
+#endif
+
 namespace gin {
 
 namespace {
@@ -58,6 +62,10 @@ void RunTestFromFile(const base::FilePath& path, FileRunnerDelegate* delegate,
 
   base::MessageLoop message_loop;
 
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+  gin::IsolateHolder::LoadV8Snapshot();
+#endif
+
   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
                                  gin::ArrayBufferAllocator::SharedInstance());
   gin::IsolateHolder instance;