Streamlined sideload UI for extensions from the webstore.

http://i.imgur.com/OOjPmDJ.png

Sideloaded extensions that have a webstore update URL have a global error bubble replacing the normal extension install dialog.

Still TODO:
- Making this not appear for new profiles.
- Unit tests.

BUG=229083

Review URL: https://chromiumcodereview.appspot.com/14328029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195391 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/extension_install_prompt.cc

@@ -520,12 +520,15 @@ void ExtensionInstallPrompt::ConfirmReEnable(Delegate* delegate,
 }
 
 void ExtensionInstallPrompt::ConfirmExternalInstall(
-    Delegate* delegate, const Extension* extension) {
+    Delegate* delegate,
+    const Extension* extension,
+    const ShowDialogCallback& show_dialog_callback) {
   DCHECK(ui_loop_ == MessageLoop::current());
   extension_ = extension;
   permissions_ = extension->GetActivePermissions();
   delegate_ = delegate;
   prompt_.set_type(EXTERNAL_INSTALL_PROMPT);
+  show_dialog_callback_ = show_dialog_callback;
 
   LoadImageIfNeeded();
 }

chrome/browser/extensions/extension_install_prompt.h

@@ -268,8 +268,10 @@ class ExtensionInstallPrompt
   // extension should be enabled (external extensions are installed disabled).
   //
   // We *MUST* eventually call either Proceed() or Abort() on |delegate|.
-  virtual void ConfirmExternalInstall(Delegate* delegate,
-                                      const extensions::Extension* extension);
+  virtual void ConfirmExternalInstall(
+      Delegate* delegate,
+      const extensions::Extension* extension,
+      const ShowDialogCallback& show_dialog_callback);
 
   // This is called by the extension permissions API to verify whether an
   // extension may be granted additional permissions.