Revert of telemetry: Add a page set for blink's memory usage measurement

Revert of telemetry: Add a page set for blink's memory usage measurement (patchset #18 id:380001 of https://codereview.chromium.org/1266833004/ )

Reason for revert:
memory.memory_health_plan failure on chromium.perf Linux/Mac/Win bots

See https://code.google.com/p/chromium/issues/detail?id=532075

Original issue's description:
> telemetry: Add a page set for blink's memory usage measurement
>
> The page set will be used as metrics for tracking memory
> reduction efforts on Blink. Details can be found at [1].
>
> [1] https://docs.google.com/document/d/1zlGQkwkWEu5LUg-CrZHHRuhDtZcuvrRv8bjdC8-noaU/edit?usp=sharing
>
> BUG=524338
>
> CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect;tryserver.chromium.perf:win_perf_bisect;tryserver.chromium.perf:android_nexus5_perf_bisect
>
> Committed: https://crrev.com/0836ebab5ec66a9092722acacdbacc15b02b18ce
> Cr-Commit-Position: refs/heads/master@{#348864}

TBR=perezju@chromium.org,hajimehoshi@chromium.org,nednguyen@google.com,petrcermak@chromium.org,primiano@chromium.org,skyostil@chromium.org,bashi@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=524338
Committed: https://crrev.com/61473901d6d9ec189aab01ef711d9d378705e9ef
Cr-Commit-Position: refs/heads/master@{#348891}

[Zhen Wang, 2015-09-15 15:29:45]

Created Revert of telemetry: Add a page set for blink's memory usage measurement

[commit-bot: I haz the power, 2015-09-15 15:30:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1347663003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1347663003/1

[commit-bot: I haz the power, 2015-09-15 15:30:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-15 15:31:49]

Patchset 1 (id:??) landed as
https://crrev.com/61473901d6d9ec189aab01ef711d9d378705e9ef
Cr-Commit-Position: refs/heads/master@{#348891}

[commit-bot: I haz the power, 2015-09-23 12:45:12]

Patchset 1 (id:??) landed as
https://crrev.com/61473901d6d9ec189aab01ef711d9d378705e9ef
Cr-Commit-Position: refs/heads/master@{#348891}