mash: Store chrome --mash crash key metadata in shared memory

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 03d45d7614d313ccd655a1803787e0d613ad7fcf..edf48d01844f9d6e2e42ebb12395184ca82e0323 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -4998,8 +4998,6 @@ if (!is_android) {
       "../app/chrome_watcher_command_line_win.cc",
       "../app/chrome_watcher_command_line_win_unittest.cc",
       "../app/resources/resources_unittest.cc",
-      "../common/crash_keys.cc",
-      "../common/crash_keys.h",
     ]
     deps = [
       ":test_support",
@@ -5008,9 +5006,15 @@ if (!is_android) {
       "//breakpad:client",
       "//chrome/browser",
       "//chrome/child",
+      "//chrome/common",
       "//components/crash/core/common",
       "//components/flags_ui:switches",
     ]
+
+    if (is_chromeos) {
+      sources += [ "../app/mash/mash_crash_keys_unittest.cc" ]
+      deps += [ "//chrome/app/mash" ]
+    }
   }
 }