Remove some "namespace" classes from C++ Kernel

Remove some "namespace" classes from C++ Kernel

The C++ implementation of Kernel has some classes that are serving as
namespaces for enums.  Remove them.

BUG=
R=jensj@google.com

Committed: https://github.com/dart-lang/sdk/commit/2f48593d9a813d091328d46f11c4a687a85992b5

[Kevin Millikin (Google), 2017-08-17 12:29:24]

kmillikin@google.com changed reviewers:
+ jensj@google.com

[Kevin Millikin (Google), 2017-08-17 12:29:25]

https://codereview.chromium.org/3001093002/diff/1/runtime/vm/kernel_binary_fl...
File runtime/vm/kernel_binary_flowgraph.h (left):

https://codereview.chromium.org/3001093002/diff/1/runtime/vm/kernel_binary_fl...
runtime/vm/kernel_binary_flowgraph.h:20: class StreamingDartTypeTranslator {
The ...Helper classes were just moved before this, because the full definition
of FunctionNodeHelper is now needed earlier in this header file (for the
AsyncMarker).

[jensj, 2017-08-17 12:32:33]

lgtm

[Kevin Millikin (Google), 2017-08-17 12:34:10]

Description was changed from

==========
Remove some "namespace" classes from C++ Kernel

The C++ implementation of Kernel has some classes that are serving as
namespaces for enums.  Remove them.

BUG=
==========

to

==========
Remove some "namespace" classes from C++ Kernel

The C++ implementation of Kernel has some classes that are serving as
namespaces for enums.  Remove them.

BUG=
R=jensj@google.com

Committed:
https://github.com/dart-lang/sdk/commit/2f48593d9a813d091328d46f11c4a687a85992b5
==========

[Kevin Millikin (Google), 2017-08-17 12:34:13]

Committed patchset #1 (id:1) manually as
2f48593d9a813d091328d46f11c4a687a85992b5 (presubmit successful).