Revert 230224 "Remove constructors of TraceEventHandle", which cause compile failure on windows.

> Remove constructors of TraceEventHandle
> 
> The constructors of TraceEventHandle makes the constructor of
> ScopedTracer (which is called even when tracing is not enabled)
> initialize the Data structure which we wanted to avoid.
> 
> BUG=trace-viewer:489
> R=dsinclair@chromium.org
> 
> Review URL: https://codereview.chromium.org/33423006

TBR=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/34413006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230232 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230232
[telemetry] Allow exact name matching.

BUG=307173
R=tonyg@chromium.org

Review URL: https://codereview.chromium.org/26860007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230233 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230233