Remove a couple more core/ header includes from v8_inspector

Remove a couple more core/ header includes from v8_inspector

Removed all uses of Frame in InspectorTraceEvents
in the process, since none of them actually
needed a Frame (since each sky instance only
has one frame).

I've just been burning down the list of core
includes using:
grep "#include" sky/engine/v8_inspector/* -h | sort | uniq | sort | grep core

TBR=yurys@chromium.org
BUG=435243
Committed: https://chromium.googlesource.com/external/mojo/+/d88bb922f71fe78adf5c32e4e0a2ba79e00b3e34

[eseidel, 2014-12-02 21:38:07]

Committed patchset #1 (id:1) manually as
d88bb922f71fe78adf5c32e4e0a2ba79e00b3e34.

[yurys, 2014-12-03 07:33:36]

lgtm

https://codereview.chromium.org/771323002/diff/1/sky/engine/core/inspector/In...
File sky/engine/core/inspector/InspectorTraceEvents.h (right):

https://codereview.chromium.org/771323002/diff/1/sky/engine/core/inspector/In...
sky/engine/core/inspector/InspectorTraceEvents.h:28: class InspectorLayoutEvent
{
It might make sense to remove this file altogether along with all trace points
that depend on it. All of them were added to implement DevTools Timeline based
using tracing infrastructure. As long as there is no tracing agent in Sky they
don't make much sense. You might want add it later though.

https://codereview.chromium.org/771323002/diff/1/sky/engine/v8_inspector/Asyn...
File sky/engine/v8_inspector/AsyncCallStackTracker.cpp (right):

https://codereview.chromium.org/771323002/diff/1/sky/engine/v8_inspector/Asyn...
sky/engine/v8_inspector/AsyncCallStackTracker.cpp:244: // void
AsyncCallStackTracker::didPostExecutionContextTask(ExecutionContext* context,
ExecutionContextTask* task, const ScriptValue& callFrames)
Should this code be removed too given that the include is removed?

[eseidel, 2014-12-03 07:42:38]

We definitely have tracing support in sky, although unclear how much of that
routes to the devtools profiling.  I think it might actually make sense to wire
up the profiling panel, I just haven't looked at doing that yet.