Initial inline web store install bindings.

chrome/renderer/extensions/extension_helper.cc

Index: chrome/renderer/extensions/extension_helper.cc
diff --git a/chrome/renderer/extensions/extension_helper.cc b/chrome/renderer/extensions/extension_helper.cc
index 4eaee1eca35d21f0edf6f8b9ef9ff97b723c4f76..506e4aaee09e224938ed4c8b881baacc3beda949 100644
--- a/chrome/renderer/extensions/extension_helper.cc
+++ b/chrome/renderer/extensions/extension_helper.cc
@@ -102,6 +102,11 @@ bool ExtensionHelper::InstallWebApplicationUsingDefinitionFile(
   return true;
 }
 
+void ExtensionHelper::InlineWebstoreInstall(std::string webstore_item_id) {
+  Send(new ExtensionHostMsg_InlineWebstoreInstall(
+      routing_id(), webstore_item_id));
+}
+
 bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ExtensionHelper, message)