Reland 2: Android: Add support for TraceEvent before the native library is loaded. (patchset #2 id:…

Reland 2 of: Android: Add support for TraceEvent before the native library is loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
TBR=yfriedman,jam

Committed: https://crrev.com/cac088acd2bfd7e76d87db1778a925f8861ab0f7
Cr-Commit-Position: refs/heads/master@{#406264}

[Benoit L, 2016-07-19 11:47:48]

Description was changed from

==========
Reland 2: Android: Add support for TraceEvent before the native library is
loaded. (patchset #2 id:230001 of https://codereview.chromium.org/2142803002/ )"

This reverts commit 424329814fe672dd6e5c18d6e6aa6311b34f034b.
==========

to

==========
Reland 2: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
==========

[Benoit L, 2016-07-19 11:51:59]

Description was changed from

==========
Reland 2: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
==========

to

==========
Reland 2 of: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
==========

[Benoit L, 2016-07-19 11:52:57]

lizeb@chromium.org changed reviewers:
+ phoglund@chromium.org

[phoglund_chromium, 2016-07-19 11:59:05]

lgtm on patch set 2

[Benoit L, 2016-07-19 11:59:50]

The CQ bit was checked by lizeb@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-07-19 12:00:00]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-19 13:26:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-19 13:26:32]

Dry run: This issue passed the CQ dry run.

[Benoit L, 2016-07-19 13:29:15]

Description was changed from

==========
Reland 2 of: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
==========

to

==========
Reland 2 of: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
TBR=yfriedman,jam
==========

[Benoit L, 2016-07-19 13:29:36]

The CQ bit was checked by lizeb@chromium.org

[commit-bot: I haz the power, 2016-07-19 13:30:04]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-19 13:35:04]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-19 13:35:09]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-19 13:37:12]

Description was changed from

==========
Reland 2 of: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
TBR=yfriedman,jam
==========

to

==========
Reland 2 of: Android: Add support for TraceEvent before the native library is
loaded.

This is a revert of https://codereview.chromium.org/2142803002/

Initial commit description:

Android: Add support for TraceEvent before the native library is loaded.

Currently TraceEvents recorded before the native library load are
silently discarded. This CL adds support for such "early" events.

The events are buffered in Java, and then sent to the native side once
it is available. This support is intentionally simple now. The aim is to
ease performance investigation of early startup, and to ease tracking of
early startup performance regression, since timings are then accessible
to TBM tests.

Also use the newly-introduced events in a couple places, and fix a bug
in the TraceEvent we use to record the launcher activity lifetime (when
an Activity calls finish from onCreate(), onPause() is not called).

BUG=564041
TBR=yfriedman,jam

Committed: https://crrev.com/cac088acd2bfd7e76d87db1778a925f8861ab0f7
Cr-Commit-Position: refs/heads/master@{#406264}
==========

[commit-bot: I haz the power, 2016-07-19 13:37:13]

Patchset 2 (id:??) landed as
https://crrev.com/cac088acd2bfd7e76d87db1778a925f8861ab0f7
Cr-Commit-Position: refs/heads/master@{#406264}