Move ExtensionCache to //extensions

extensions/browser/test_extensions_browser_client.cc

Index: extensions/browser/test_extensions_browser_client.cc
diff --git a/extensions/browser/test_extensions_browser_client.cc b/extensions/browser/test_extensions_browser_client.cc
index 33b42e06374c97ac043e700f324ac1fa2927450b..409469b590cc9cef254a4bf94b559fe410f42eb5 100644
--- a/extensions/browser/test_extensions_browser_client.cc
+++ b/extensions/browser/test_extensions_browser_client.cc
@@ -8,6 +8,7 @@
 #include "extensions/browser/app_sorting.h"
 #include "extensions/browser/extension_host_delegate.h"
 #include "extensions/browser/test_runtime_api_delegate.h"
+#include "extensions/browser/updater/null_extension_cache.h"
 
 using content::BrowserContext;
 
@@ -18,7 +19,8 @@ TestExtensionsBrowserClient::TestExtensionsBrowserClient(
     : main_context_(main_context),
       incognito_context_(NULL),
       process_manager_delegate_(NULL),
-      extension_system_factory_(NULL) {
+      extension_system_factory_(NULL),
+      extension_cache_(new NullExtensionCache) {
   DCHECK(main_context_);
   DCHECK(!main_context_->IsOffTheRecord());
 }
@@ -171,4 +173,8 @@ net::NetLog* TestExtensionsBrowserClient::GetNetLog() {
   return NULL;
 }
 
+ExtensionCache* TestExtensionsBrowserClient::GetExtensionCache() {
+  return extension_cache_.get();
+}
+
 }  // namespace extensions