WebUI TaskManager: Show 'Private Memory' instead of 'Physical Memory' on Linux & ChromeOS
WebUI TaskManager: Show 'Private Memory' instead of 'Physical Memory' on Linux & ChromeOS

With this CL, task manager shows 'Private Memory' on Linux and ChromeOS because calculating Physical Memory is slow. It is the same as native task manager.

BUG=108760
TEST=manual

Review URL: https://chromiumcodereview.appspot.com/9200013

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@119013 0039d316-1c4b-4281-b951-d872f2087c98

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