Move ExtensionCache to //extensions

extensions/shell/browser/shell_extensions_browser_client.cc

Index: extensions/shell/browser/shell_extensions_browser_client.cc
diff --git a/extensions/shell/browser/shell_extensions_browser_client.cc b/extensions/shell/browser/shell_extensions_browser_client.cc
index a4aee60d862cedb4944f6bb6f9856f8aafcaa06a..68c34483c4b0f4d1d06dc6666cdeb1f79525c557 100644
--- a/extensions/shell/browser/shell_extensions_browser_client.cc
+++ b/extensions/shell/browser/shell_extensions_browser_client.cc
@@ -17,6 +17,7 @@
 #include "extensions/browser/extension_function_registry.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/null_app_sorting.h"
+#include "extensions/browser/updater/null_extension_cache.h"
 #include "extensions/browser/url_request_util.h"
 #include "extensions/shell/browser/shell_extension_host_delegate.h"
 #include "extensions/shell/browser/shell_extension_system_factory.h"
@@ -37,7 +38,9 @@ void RegisterPrefs(user_prefs::PrefRegistrySyncable* registry) {
 
 ShellExtensionsBrowserClient::ShellExtensionsBrowserClient(
     BrowserContext* context)
-    : browser_context_(context), api_client_(new ExtensionsAPIClient) {
+    : browser_context_(context),
+      api_client_(new ExtensionsAPIClient),
+      extension_cache_(new NullExtensionCache()) {
   // Set up the preferences service.
   base::PrefServiceFactory factory;
   factory.set_user_prefs(new TestingPrefStore);
@@ -219,4 +222,8 @@ net::NetLog* ShellExtensionsBrowserClient::GetNetLog() {
   return NULL;
 }
 
+ExtensionCache* ShellExtensionsBrowserClient::GetExtensionCache() {
+  return extension_cache_.get();
+}
+
 }  // namespace extensions