Make uninstall actually work on component builds.

Move setup's component DLLs to TEMP just like setup.exe, leaving no in-use files in the Application dir.

BUG=346512
TEST=Install/Uninstall Chrome and confirm that the Application directory is removed for realz!!

Review URL: https://codereview.chromium.org/179043002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253477 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253477
Add option to install an ephemeral app to the Windows jump list 

This patch adds an entry to the Windows jump list to install an 
ephemeral packaged app. Jump lists are available in Win 7 and 
later. 

BUG=339253
TEST=If an app is launched ephemerally, there should be an
"Install app" item under the "Tasks" category when right-clicking 
on the app's icon in the Windows taskbar. If the app is installed,
the "Install app" item should be absent.

Review URL: https://codereview.chromium.org/176233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253478 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253478