Add the basic infrastructure for the Behavior feature type: BehaviorFeature and

extensions/shell/common/shell_extensions_client.cc

Index: extensions/shell/common/shell_extensions_client.cc
diff --git a/extensions/shell/common/shell_extensions_client.cc b/extensions/shell/common/shell_extensions_client.cc
index a598dede0294e78cc9b501f7b4dc5cb6513216bb..01fe44e11e4336a88d067d3b6b4f2a35b316ba34 100644
--- a/extensions/shell/common/shell_extensions_client.cc
+++ b/extensions/shell/common/shell_extensions_client.cc
@@ -15,6 +15,7 @@
 #include "extensions/common/features/manifest_feature.h"
 #include "extensions/common/features/permission_feature.h"
 #include "extensions/common/features/simple_feature.h"
+#include "extensions/common/features/switch_feature.h"
 #include "extensions/common/manifest_handler.h"
 #include "extensions/common/permissions/permission_message_provider.h"
 #include "extensions/common/permissions/permissions_info.h"
@@ -115,6 +116,9 @@ scoped_ptr<FeatureProvider> ShellExtensionsClient::CreateFeatureProvider(
   } else if (name == "permission") {
     provider.reset(new BaseFeatureProvider(source->dictionary(),
                                            CreateFeature<PermissionFeature>));
+  } else if (name == "switch") {
+    provider.reset(new BaseFeatureProvider(source->dictionary(),
+                                           CreateFeature<SwitchFeature>));
   } else {
     NOTREACHED();
   }
@@ -133,6 +137,8 @@ ShellExtensionsClient::CreateFeatureProviderSource(
     source->LoadJSON(IDR_EXTENSION_MANIFEST_FEATURES);
   } else if (name == "permission") {
     source->LoadJSON(IDR_EXTENSION_PERMISSION_FEATURES);
+  } else if (name == "switch") {
+    source->LoadJSON(IDR_EXTENSION_SWITCH_FEATURES);
   } else {
     NOTREACHED();
     source.reset();