First couple of steps of improving the extension/app update process.

For Apps and Extensions with a lazy background page, this will delay installing
an update until the background page gets unloaded (or next chrome restart).
Also adds a chrome.runtime.onUpdateAvailable event which is fired when an update is
available but isn't being installed immediately because the app is not idle.
It doesn't change anything yet for Extensions with a persistent background page
(or extensions without a background page at all). Those still get updated as soon
as an update is found.

BUG=37971
BUG=143260
TBR=nick@chromium.org 

Review URL: https://chromiumcodereview.appspot.com/11293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166358 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 2 deletions

diff --git a/chrome/browser/extensions/crx_installer.cc b/chrome/browser/extensions/crx_installer.cc
index 040e353..0ee089b 100644
--- a/chrome/browser/extensions/crx_installer.cc
+++ b/chrome/browser/extensions/crx_installer.cc
@@ -103,7 +103,8 @@ CrxInstaller::CrxInstaller(
       record_oauth2_grant_(false),
       error_on_unsupported_requirements_(false),
       requirements_checker_(new extensions::RequirementsChecker()),
-      has_requirement_errors_(false) {
+      has_requirement_errors_(false),
+      install_wait_for_idle_(true) {
   if (!approval)
     return;
 
@@ -630,7 +631,8 @@ void CrxInstaller::ReportSuccessFromUIThread() {
   // extension_ to it.
   frontend_weak_->OnExtensionInstalled(extension_,
                                        page_ordinal_,
-                                       has_requirement_errors_);
+                                       has_requirement_errors_,
+                                       install_wait_for_idle_);
 
   NotifyCrxInstallComplete(extension_.get());