Add a new webstorePrivate API to show a permission prompt for delegated installs

chrome/browser/extensions/api/webstore_private/webstore_private_api.h

Index: chrome/browser/extensions/api/webstore_private/webstore_private_api.h
diff --git a/chrome/browser/extensions/api/webstore_private/webstore_private_api.h b/chrome/browser/extensions/api/webstore_private/webstore_private_api.h
index 06436443a5092b233d0f766999e23e55e9ab4a6d..45f61134080cf8cb003cc810d82692b96f1e6331 100644
--- a/chrome/browser/extensions/api/webstore_private/webstore_private_api.h
+++ b/chrome/browser/extensions/api/webstore_private/webstore_private_api.h
@@ -120,6 +120,55 @@ class WebstorePrivateCompleteInstallFunction
   scoped_ptr<ScopedActiveInstall> scoped_active_install_;
 };
 
+class WebstorePrivateShowPermissionPromptForDelegatedInstallFunction
+    : public UIThreadExtensionFunction,
+      public ExtensionInstallPrompt::Delegate,
+      public WebstoreInstallHelper::Delegate {
+ public:
+  DECLARE_EXTENSION_FUNCTION(
+      "webstorePrivate.showPermissionPromptForDelegatedInstall",
+      WEBSTOREPRIVATE_SHOWPERMISSIONPROMPTFORDELEGATEDINSTALL)
+
+  WebstorePrivateShowPermissionPromptForDelegatedInstallFunction();
+
+ private:
+  ~WebstorePrivateShowPermissionPromptForDelegatedInstallFunction() override;
+
+  // ExtensionFunction:
+  ExtensionFunction::ResponseAction Run() override;
+
+  // WebstoreInstallHelper::Delegate:
+  void OnWebstoreParseSuccess(const std::string& id,
+                              const SkBitmap& icon,
+                              base::DictionaryValue* parsed_manifest) override;
+  void OnWebstoreParseFailure(const std::string& id,
+                              InstallHelperResultCode result,
+                              const std::string& error_message) override;
+
+  // ExtensionInstallPrompt::Delegate:
+  void InstallUIProceed() override;
+  void InstallUIAbort(bool user_initiated) override;
+
+  ExtensionFunction::ResponseValue BuildResponse(
+      api::webstore_private::Result result,
+      const std::string& error);
+
+  // This stores the input parameters to the function.
+  scoped_ptr<api::webstore_private::ShowPermissionPromptForDelegatedInstall::
+      Params> params_;
+
+  // The results of parsing manifest_ and icon_data_ go into these two.
+  scoped_ptr<base::DictionaryValue> parsed_manifest_;
+  SkBitmap icon_;
+
+  // A dummy Extension object we create for the purposes of using
+  // ExtensionInstallPrompt to prompt for confirmation of the install.
+  scoped_refptr<Extension> dummy_extension_;
+
+  // The class that displays the install prompt.
+  scoped_ptr<ExtensionInstallPrompt> install_prompt_;
+};
+
 class WebstorePrivateEnableAppLauncherFunction
     : public UIThreadExtensionFunction {
  public: