Move permission warning message handling from PermissionSet to PermissionMessageProvider.

extensions/common/permissions/permission_message_provider.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/common/permissions/permission_message_provider.h"
+
+#include "base/lazy_instance.h"
+#include "base/stl_util.h"
+
+namespace extensions {
+
+namespace {
+
+struct Providers {
+  friend struct base::DefaultLazyInstanceTraits<Providers>;
+
+  ~Providers();
+
+  scoped_ptr<PermissionMessageProvider> default_provider;
+  std::vector<std::pair<Manifest::Type, PermissionMessageProvider* > >

[Matt Perry, 2013/10/16 20:07:04]

how about a map?

+      custom_providers;
+};
+
+Providers::~Providers() {
+  STLDeleteContainerPairSecondPointers(custom_providers.begin(),
+                                       custom_providers.end());
+}
+
+base::LazyInstance<Providers> g_providers = LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+// static
+PermissionMessageProvider* PermissionMessageProvider::Get(
+    Manifest::Type extension_type) {
+  for (size_t i = 0; i < g_providers.Get().custom_providers.size(); ++i) {
+    if (g_providers.Get().custom_providers[i].first == extension_type)
+      return g_providers.Get().custom_providers[i].second;
+  }
+  return g_providers.Get().default_provider.get();
+}
+
+// static
+void PermissionMessageProvider::SetProviders(
+    PermissionMessageProvider* default_provider,
+    const std::vector<std::pair<Manifest::Type, PermissionMessageProvider*> >&
+        custom_providers) {
+  g_providers.Get().default_provider.reset(default_provider);
+  g_providers.Get().custom_providers = custom_providers;
+}
+
+}  // namespace extensions