Revert 107813 - add classes trace_analyzer::Query and TraceAnalyzer to make it easy to search thr...

Revert 107813 - add classes trace_analyzer::Query and TraceAnalyzer to make it easy to search through trace data.

This also adds a trace_analyzer::TraceEvent class that can be constructed from JSON data (via base::Value). TraceEvent mirrors base::debug::TraceEvent in a form that is lower performance and easier to use in test code.

BUG=95714
TEST=base_unittests

Review URL: http://codereview.chromium.org/7981004

TBR=jbates@chromium.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=107845