Making ShowExtensionInstallDialog a callback

chrome/browser/extensions/crx_installer.cc

Index: chrome/browser/extensions/crx_installer.cc
diff --git a/chrome/browser/extensions/crx_installer.cc b/chrome/browser/extensions/crx_installer.cc
index e51b225e73cc7387a1d99a46ae2642909fd82dcb..1a1789e6c10d3110f558ea2615883b0dc8f3c72d 100644
--- a/chrome/browser/extensions/crx_installer.cc
+++ b/chrome/browser/extensions/crx_installer.cc
@@ -25,6 +25,7 @@
 #include "chrome/browser/extensions/convert_web_app.h"
 #include "chrome/browser/extensions/default_apps_trial.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
+#include "chrome/browser/extensions/extension_install_dialog.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
@@ -124,6 +125,10 @@ CrxInstaller::CrxInstaller(
     expected_id_ = approval->extension_id;
     record_oauth2_grant_ = approval->record_oauth2_grant;
   }
+
+  dialog_ = approval->dialog_;
+  if (!dialog_.get())
+    dialog_ = ExtensionInstallDialog::CreateDefaultImpl();
 }
 
 CrxInstaller::~CrxInstaller() {
@@ -453,7 +458,7 @@ void CrxInstaller::ConfirmInstall() {
 
   if (client_ && (!allow_silent_install_ || !approved_)) {
     AddRef();  // Balanced in Proceed() and Abort().
-    client_->ConfirmInstall(this, extension_.get());
+    client_->ConfirmInstall(this, extension_.get(), dialog_);
   } else {
     if (!BrowserThread::PostTask(
             BrowserThread::FILE, FROM_HERE,