Worklet: Move loader client impl from ThreadedWorklet to ThreadedWorkletMessagingProxy

Worklet: Move loader client impl from ThreadedWorklet to ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements the loader client for
classic script loading. That's blocking the merge effort. This CL moves the
client implementation from ThreadedWorklet to ThreadedWorkletMessagingProxy as
LoaderClient and reduces differences between MainThreadWorklet and
ThreadedWorklet.

DesignDoc: https://docs.google.com/document/d/1cgLcrua7H_7x_o5GlzYrAi2qt-TqTzgtOeixFAugR6g/edit?usp=sharing

BUG=727194

[nhiroki, 2017-05-30 01:31:24]

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

[commit-bot: I haz the power, 2017-05-30 01:31:35]

Dry run: CQ is trying da patch.

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

[nhiroki, 2017-05-30 01:32:54]

Description was changed from

==========
Worklet: Move script loading code from ThreadedWorklet to
ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements a part of classic
script loading. That's blocking the merge effort. This CL moves the loading code
from ThreadedWorklet to ThreadedWorkletMessagingProxy as LoaderClient and
reduces differences between MainThreadWorklet and ThreadedWorklet.

BUG=727194
==========

to

==========
Worklet: Move loader client impl from ThreadedWorklet to
ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements the loader client for
classic script loading. That's blocking the merge effort. This CL moves the
client implementation from ThreadedWorklet to ThreadedWorkletMessagingProxy as
LoaderClient and reduces differences between MainThreadWorklet and
ThreadedWorklet.

BUG=727194
==========

[nhiroki, 2017-05-30 01:33:04]

Description was changed from

==========
Worklet: Move loader client impl from ThreadedWorklet to
ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements the loader client for
classic script loading. That's blocking the merge effort. This CL moves the
client implementation from ThreadedWorklet to ThreadedWorkletMessagingProxy as
LoaderClient and reduces differences between MainThreadWorklet and
ThreadedWorklet.

BUG=727194
==========

to

==========
Worklet: Move loader client impl from ThreadedWorklet to
ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements the loader client for
classic script loading. That's blocking the merge effort. This CL moves the
client implementation from ThreadedWorklet to ThreadedWorkletMessagingProxy as
LoaderClient and reduces differences between MainThreadWorklet and
ThreadedWorklet.

BUG=727194
==========

[nhiroki, 2017-05-30 01:33:36]

Description was changed from

==========
Worklet: Move loader client impl from ThreadedWorklet to
ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements the loader client for
classic script loading. That's blocking the merge effort. This CL moves the
client implementation from ThreadedWorklet to ThreadedWorkletMessagingProxy as
LoaderClient and reduces differences between MainThreadWorklet and
ThreadedWorklet.

BUG=727194
==========

to

==========
Worklet: Move loader client impl from ThreadedWorklet to
ThreadedWorkletMessagingProxy

This is an initial step to merge MainThreadWorklet and ThreadedWorklet into
Worklet.

In the current implementation, ThreadedWorklet implements the loader client for
classic script loading. That's blocking the merge effort. This CL moves the
client implementation from ThreadedWorklet to ThreadedWorkletMessagingProxy as
LoaderClient and reduces differences between MainThreadWorklet and
ThreadedWorklet.

DesignDoc:
https://docs.google.com/document/d/1cgLcrua7H_7x_o5GlzYrAi2qt-TqTzgtOeixFAugR...

BUG=727194
==========

[commit-bot: I haz the power, 2017-05-30 04:02:45]

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

[commit-bot: I haz the power, 2017-05-30 04:02:47]

Dry run: This issue passed the CQ dry run.