Video Player: Install the cast API extension if it is not installed.

chrome/browser/chromeos/file_manager/app_installer.cc

Index: chrome/browser/chromeos/file_manager/app_installer.cc
diff --git a/chrome/browser/chromeos/file_manager/app_installer.cc b/chrome/browser/chromeos/file_manager/app_installer.cc
index 18ffcd52bc5f82da3d793813a7a71c8f2a0296a7..0f5c7a1979c1792ba96a0cbfd50488c1787d6772 100644
--- a/chrome/browser/chromeos/file_manager/app_installer.cc
+++ b/chrome/browser/chromeos/file_manager/app_installer.cc
@@ -36,8 +36,10 @@ class AppInstaller::WebContentsObserver : public content::WebContentsObserver {
 AppInstaller::AppInstaller(content::WebContents* web_contents,
                            const std::string& item_id,
                            Profile* profile,
+                           bool silent_installation,
                            const Callback& callback)
     : extensions::WebstoreStandaloneInstaller(item_id, profile, callback),
+      silent_installation_(silent_installation),
       callback_(callback),
       web_contents_(web_contents),
       web_contents_observer_(new WebContentsObserver(web_contents, this)) {
@@ -56,6 +58,9 @@ const GURL& AppInstaller::GetRequestorURL() const {
 
 scoped_refptr<ExtensionInstallPrompt::Prompt>
 AppInstaller::CreateInstallPrompt() const {
+  if (silent_installation_)
+    return NULL;
+
   scoped_refptr<ExtensionInstallPrompt::Prompt> prompt(
       new ExtensionInstallPrompt::Prompt(
           ExtensionInstallPrompt::INLINE_INSTALL_PROMPT));