Deprecate self and total time getters and total sample count getter on CpuProfileNode

Deprecate self and total time getters and total sample count getter on CpuProfileNode

All of these values are derived from the self samples count and there is no need to evaluate them in v8 when clients can do that when needed on their side.

Also added unsigned GetHitCount() which should be used instead of double GetSelfSamplesCount(). I'm going to deprecate the latter one once Blink has switched to GetHitCount.

BUG=267595
TBR=svenpanne@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=16119

[yurys, 2013-08-09 07:37:25]

This is exact clone of r16116 which was rolled out in r16117 due to pending
Blink roll in Chromium. Now that Blink r155755 is rolled (Chromium DEPS points
at Blink r155780) it is safe to re-land this.

[yurys, 2013-08-09 07:38:33]

Committed patchset #1 manually as r16119 (presubmit successful).