Extract extension-related renderer setup from ExtensionService

Move it into a new class RendererStartupHelper. This allows app_shell and
other clients of the src/extensions module use it without running code in
src/chrome.

Also ensure extension processes are added to the extensions::ProcessMap in
app_shell.

BUG=334710
TEST=Existing extensions browser_tests. Also, running app_shell manually still loads an extension.

Review URL: https://codereview.chromium.org/145003006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247379 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 74 insertions, 0 deletions

diff --git a/extensions/browser/renderer_startup_helper.h b/extensions/browser/renderer_startup_helper.h
new file mode 100644
index 0000000..7fcc70f
--- /dev/null
+++ b/extensions/browser/renderer_startup_helper.h
@@ -0,0 +1,74 @@
+// Copyright 2014 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.
+
+#ifndef EXTENSIONS_BROWSER_RENDER_PROCESS_HELPER_H_
+#define EXTENSIONS_BROWSER_RENDER_PROCESS_HELPER_H_
+
+#include "base/compiler_specific.h"
+#include "base/memory/singleton.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service_factory.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+namespace content {
+class BrowserContext;
+class RenderProcessHost;
+}
+
+namespace extensions {
+
+// Informs renderers about extensions-related data (channel, available
+// functions, etc.) when they start. Sends this information to both extension
+// and non-extension renderers, as the non-extension renderers may have content
+// scripts. Lives on the UI thread. Shared between incognito and non-incognito
+// browser contexts.
+class RendererStartupHelper : public BrowserContextKeyedService,
+                              public content::NotificationObserver {
+ public:
+  // This class sends messages to all renderers started for |browser_context|.
+  explicit RendererStartupHelper(content::BrowserContext* browser_context);
+  virtual ~RendererStartupHelper();
+
+  // content::NotificationObserver overrides:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  content::BrowserContext* browser_context_;  // Not owned.
+
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererStartupHelper);
+};
+
+// Factory for RendererStartupHelpers. Declared here because this header is
+// rarely included and it's probably cheaper to put it here than to make the
+// compiler generate another object file.
+class RendererStartupHelperFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static RendererStartupHelper* GetForBrowserContext(
+      content::BrowserContext* context);
+  static RendererStartupHelperFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<RendererStartupHelperFactory>;
+
+  RendererStartupHelperFactory();
+  virtual ~RendererStartupHelperFactory();
+
+  // BrowserContextKeyedServiceFactory implementation:
+  virtual BrowserContextKeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const OVERRIDE;
+  virtual content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const OVERRIDE;
+  virtual bool ServiceIsCreatedWithBrowserContext() const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererStartupHelperFactory);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_RENDER_PROCESS_HELPER_H_