Move V8 snapshot loading code from isolate_holder to gin/v8_startup_data.{h,cc}.

content/shell/browser/shell_content_browser_client.cc

Index: content/shell/browser/shell_content_browser_client.cc
diff --git a/content/shell/browser/shell_content_browser_client.cc b/content/shell/browser/shell_content_browser_client.cc
index 90cc70cfd2a1e47d4c3096abfa2a8dc017a69b43..ad4a186d150cfae54cd9156bf9c1febe508e8b8b 100644
--- a/content/shell/browser/shell_content_browser_client.cc
+++ b/content/shell/browser/shell_content_browser_client.cc
@@ -34,7 +34,7 @@
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/common/shell_switches.h"
 #include "content/shell/common/webkit_test_helpers.h"
-#include "gin/public/isolate_holder.h"
+#include "gin/v8_initializer.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
@@ -354,14 +354,14 @@ void ShellContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
   if (v8_snapshot_fd_.get() == -1 && v8_natives_fd_.get() == -1) {
     base::FilePath v8_data_path;
-    PathService::Get(gin::IsolateHolder::kV8SnapshotBasePathKey, &v8_data_path);
+    PathService::Get(gin::V8Initializer::kV8SnapshotBasePathKey, &v8_data_path);
     DCHECK(!v8_data_path.empty());
 
     int file_flags = base::File::FLAG_OPEN | base::File::FLAG_READ;
     base::FilePath v8_natives_data_path =
-        v8_data_path.AppendASCII(gin::IsolateHolder::kNativesFileName);
+        v8_data_path.AppendASCII(gin::V8Initializer::kNativesFileName);
     base::FilePath v8_snapshot_data_path =
-        v8_data_path.AppendASCII(gin::IsolateHolder::kSnapshotFileName);
+        v8_data_path.AppendASCII(gin::V8Initializer::kSnapshotFileName);
     base::File v8_natives_data_file(v8_natives_data_path, file_flags);
     base::File v8_snapshot_data_file(v8_snapshot_data_path, file_flags);
     DCHECK(v8_natives_data_file.IsValid());