Add WebstoreInlineInstaller (downloads store data, shows the install UI, and starts the install).

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 506e4aaee09e224938ed4c8b881baacc3beda949..0071ae1dbaf9777972b59db11ed72c5927c8c411 100644
--- a/chrome/renderer/extensions/extension_helper.cc
+++ b/chrome/renderer/extensions/extension_helper.cc
@@ -107,6 +107,18 @@ void ExtensionHelper::InlineWebstoreInstall(std::string webstore_item_id) {
       routing_id(), webstore_item_id));
 }
 
+void ExtensionHelper::OnInlineWebstoreInstallResponse(
+    bool success,
+    const std::string& error) {
+  // TODO(mihaip): dispatch these as events to the the WebFrame that initiated
+  // the inline install.
+  if (success) {
+    LOG(INFO) << "Inline install succeeded.";

[asargent_no_longer_on_chrome, 2011/08/26 17:50:40]

nit: LOG(INFO) considered harmful (except in cases where you're actively
tracking down a bug in the field). Prefer VLOG instead.

... although I suppose you're going to eventually replace this code anyway based
on above TODO. 

[Mihai Parparita -not on Chrome, 2011/08/29 19:00:56]

Switched to VLOG.

+  } else {
+    LOG(ERROR) << "Inline install failed: " << error;
+  }
+}
+
 bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ExtensionHelper, message)
@@ -118,6 +130,8 @@ bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
                         OnUpdateBrowserWindowId)
     IPC_MESSAGE_HANDLER(ExtensionMsg_NotifyRenderViewType,
                         OnNotifyRendererViewType)
+    IPC_MESSAGE_HANDLER(ExtensionMsg_InlineWebstoreInstallResponse,
+                        OnInlineWebstoreInstallResponse)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;