[gin] Fingerprint the V8 snapshot files on Windows and verify before loading the snapshot.

gin/BUILD.gn

Index: gin/BUILD.gn
diff --git a/gin/BUILD.gn b/gin/BUILD.gn
index b352c3ac4f34148605151c8729bebed1523f5432..f0ffa83dcc3b6a9d97f7723c9ddcc5bc20dba96f 100644
--- a/gin/BUILD.gn
+++ b/gin/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/module_args/v8.gni")
+
 component("gin") {
   sources = [
     "arguments.cc",
@@ -68,6 +70,37 @@ component("gin") {
   deps = [
     "//base/third_party/dynamic_annotations",
   ]
+  if (v8_use_external_startup_data) {

[jochen (gone - plz use gerrit), 2015/01/08 15:11:53]

shouldn't that be v8_use_external_startup_data && windows?

[rmcilroy, 2015/01/08 16:29:21]

Done.

+    deps += [
+      ":gin_v8_snapshot_fingerprint",
+      "//crypto:crypto",
+    ]
+    sources += [ "$target_gen_dir/v8_snapshot_fingerprint.cc" ]
+  }
+}
+
+action("gin_v8_snapshot_fingerprint") {
+  script = "//gin/fingerprint/fingerprint_v8_snapshot.py"
+
+  snapshot_file = "$root_build_dir/snapshot_blob.bin"
+  natives_file = "$root_build_dir/natives_blob.bin"
+  output_file = "$target_gen_dir/v8_snapshot_fingerprint.cc"
+
+  args = [
+    "--snapshot_file",
+    rebase_path(snapshot_file, root_build_dir),
+    "--natives_file",
+    rebase_path(natives_file, root_build_dir),
+    "--output_file",
+    rebase_path(output_file, root_build_dir),
+  ]
+  inputs = [
+    snapshot_file,
+    natives_file,
+  ]
+  outputs = [
+    output_file,
+  ]
 }
 
 executable("gin_shell") {