Archive Mojom message ID salt with builds

BUG=673417

Change-Id: I033dde3fa6c5940cd35e341acc9c415b2b64eaff
Reviewed-on: https://chromium-review.googlesource.com/688751Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Commit-Queue: Ken Rockot <rockot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505289}

BUILD.gn

@@ -74,6 +74,7 @@ group("gn_all") {
     "//base:base_perftests",
     "//base:base_unittests",
     "//chrome/installer",
+    "//mojo/public/tools/bindings:copy_message_id_salt($default_toolchain)",
     "//net:net_unittests",
     "//skia:skia_unittests",
     "//sql:sql_unittests",

chrome/tools/build/chromeos/FILES.cfg

@@ -123,4 +123,10 @@ FILES = [
     'filename': 'nacl_helper_nonsfi',
     'buildtype': ['dev', 'official'],
   },
+  # Message ID salt used for Mojom messages in the build.
+  {
+    'filename': 'mojom-message-id-salt',
+    'buildtype': ['official'],
+    'archive': 'mojom-message-id-salt',
+  },
 ]

chrome/tools/build/linux/FILES.cfg

@@ -288,4 +288,10 @@ FILES = [
     'archive': 'content-shell.zip',
     'optional': ['dev'],
   },
- ]
+  # Message ID salt used for Mojom messages in the build.
+  {
+    'filename': 'mojom-message-id-salt',
+    'buildtype': ['official'],
+    'archive': 'mojom-message-id-salt',
+  },
+]

chrome/tools/build/mac/FILES.cfg

@@ -121,4 +121,10 @@ FILES = [
     'archive': 'content-shell.zip',
     'optional': ['dev'],
   },
+  # Message ID salt used for Mojom messages in the build.
+  {
+    'filename': 'mojom-message-id-salt',
+    'buildtype': ['official'],
+    'archive': 'mojom-message-id-salt',
+  },
 ]

chrome/tools/build/win/FILES.cfg

@@ -856,4 +856,10 @@ FILES = [
     'archive': 'metrics-metadata.zip',
     'optional': ['dev', 'official'],
   },
+  # Message ID salt used for Mojom messages in the build.
+  {
+    'filename': 'mojom-message-id-salt',
+    'buildtype': ['official'],
+    'archive': 'mojom-message-id-salt',
+  },
 ]

mojo/public/tools/bindings/BUILD.gn

@@ -98,4 +98,17 @@ if (current_toolchain == default_toolchain) {
     args =
         [ rebase_path("$target_gen_dir/mojom-message-id-salt", root_build_dir) ]
   }
+
+  copy("copy_message_id_salt") {
+    sources = [
+      "$target_gen_dir/mojom-message-id-salt",
+    ]
+    outputs = [
+      "$root_out_dir/mojom-message-id-salt",
+    ]
+
+    deps = [
+      ":generate_message_id_salt",
+    ]
+  }
 }