Use top-down and bottom-up profile notions in allocation profiler
Use top-down and bottom-up profile notions in allocation profiler

Similar to the CPU profiler there are top-down and bottom up allocation profile views. Data structures are renamed to use correponding naming scheme.

BUG=277984
R=alph@chromium.org

Review URL: https://codereview.chromium.org/202953003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@169432 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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