Extensions: Split extensions utility IPC messages into its own file.

chrome/chrome_browser_extensions.gypi

Index: chrome/chrome_browser_extensions.gypi
diff --git a/chrome/chrome_browser_extensions.gypi b/chrome/chrome_browser_extensions.gypi
index 6dad29ae460636820e06b8e697a0ce0eac96d658..9b0067351fbd0ec40f58d0bec0fcbd1e66cd82c7 100644
--- a/chrome/chrome_browser_extensions.gypi
+++ b/chrome/chrome_browser_extensions.gypi
@@ -498,6 +498,8 @@
         'browser/extensions/api/push_messaging/push_messaging_invalidation_mapper.h',
         'browser/extensions/api/reading_list_private/reading_list_private_api.cc',
         'browser/extensions/api/reading_list_private/reading_list_private_api.h',
+        'browser/extensions/api/runtime/chrome_runtime_api_delegate.cc',
+        'browser/extensions/api/runtime/chrome_runtime_api_delegate.h',
         'browser/extensions/api/screenlock_private/screenlock_private_api.cc',
         'browser/extensions/api/screenlock_private/screenlock_private_api.h',
         'browser/extensions/api/serial/serial_api.cc',
@@ -681,8 +683,6 @@
         'browser/extensions/chrome_extensions_browser_client.h',
         'browser/extensions/chrome_notification_observer.cc',
         'browser/extensions/chrome_notification_observer.h',
-        'browser/extensions/api/runtime/chrome_runtime_api_delegate.cc',
-        'browser/extensions/api/runtime/chrome_runtime_api_delegate.h',
         'browser/extensions/component_loader.cc',
         'browser/extensions/component_loader.h',
         'browser/extensions/context_menu_matcher.cc',
@@ -1025,12 +1025,43 @@
           'sources!': [
             'browser/extensions/browser_context_keyed_service_factories.cc',
             'browser/extensions/browser_context_keyed_service_factories.h',
+            'browser/extensions/crx_installer.cc',
+            'browser/extensions/crx_installer.h',
+            'browser/extensions/crx_installer_error.h',
             'browser/extensions/menu_manager.cc',
             'browser/extensions/menu_manager.h',
             'browser/extensions/menu_manager_factory.cc',
             'browser/extensions/menu_manager_factory.h',
+            'browser/extensions/sandboxed_unpacker.cc',
+            'browser/extensions/sandboxed_unpacker.h',
             'browser/extensions/tab_helper.cc',
             'browser/extensions/tab_helper.h',
+            'browser/extensions/updater/extension_downloader.cc',
+            'browser/extensions/updater/extension_downloader.h',
+            'browser/extensions/updater/extension_downloader_delegate.cc',
+            'browser/extensions/updater/extension_downloader_delegate.h',
+            'browser/extensions/updater/extension_updater.cc',
+            'browser/extensions/updater/extension_updater.h',
+            'browser/extensions/updater/safe_manifest_parser.cc',
+            'browser/extensions/updater/safe_manifest_parser.h',
+            'browser/extensions/webstore_data_fetcher.cc',
+            'browser/extensions/webstore_data_fetcher.h',
+            'browser/extensions/webstore_data_fetcher_delegate.cc',
+            'browser/extensions/webstore_data_fetcher_delegate.h',
+            'browser/extensions/webstore_install_helper.cc',
+            'browser/extensions/webstore_install_helper.h',
+            'browser/extensions/webstore_inline_installer.cc',
+            'browser/extensions/webstore_inline_installer.h',
+            'browser/extensions/webstore_inline_installer_factory.cc',
+            'browser/extensions/webstore_inline_installer_factory.h',
+            'browser/extensions/webstore_install_helper.cc',
+            'browser/extensions/webstore_install_helper.h',
+            'browser/extensions/webstore_install_with_prompt.cc',
+            'browser/extensions/webstore_install_with_prompt.h',
+            'browser/extensions/webstore_installer.cc',
+            'browser/extensions/webstore_installer.h',
+            'browser/extensions/webstore_standalone_installer.cc',
+            'browser/extensions/webstore_standalone_installer.h',
           ],
           'sources/': [
             # Handle files in browser/extensions/api. Exclude everything by default, white list
@@ -1055,7 +1086,6 @@
             ['include', '^browser/extensions/api/preference/preference_api.cc'],
             ['include', '^browser/extensions/api/proxy/proxy_api.cc'],
             ['include', '^browser/extensions/api/proxy/proxy_api_constants.cc'],
-            ['include', '^browser/extensions/api/runtime/chrome_runtime_api_delegate.cc'],
             ['include', '^browser/extensions/api/tabs/tabs_constants.cc'],
           ],
           'dependencies!': [