Start remove dependencies on compiler-related files.

Start remove dependencies on compiler-related files.

Minimize the number of dependencies of compiler-related files.

This is needed to remove whole .cc/.h files from a compiler-less VM binary which
can be used for running precompiled code.

* removed dependencies of object.cc on flow_graph_compiler.h and flow_graph_builder.h

* removed unnecessary includes from object.h


BUG=
R=srdjan@google.com

Committed: https://github.com/dart-lang/sdk/commit/f6b96b3d07879172f084cd3ae4ead4f337cb21a6

[Florian Schneider, 2015-11-04 21:02:02]

Description was changed from

==========
Start remove dependencies on compiler-related files.

Minimize the number of dependencies of compiler-related files.

This is needed to remove whole .cc/.h files from a compiler-less VM binary which
can be used for running precompiled code.


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

to

==========
Start remove dependencies on compiler-related files.

Minimize the number of dependencies of compiler-related files.

This is needed to remove whole .cc/.h files from a compiler-less VM binary which
can be used for running precompiled code.

* removed dependencies of object.cc on flow_graph_compiler.h and
flow_graph_builder.h

* removed unnecessary includes from object.h


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

[Florian Schneider, 2015-11-04 21:02:43]

fschneider@google.com changed reviewers:
+ srdjan@google.com

[srdjan, 2015-11-04 22:09:22]

lgtm

[Florian Schneider, 2015-11-04 23:08:40]

Committed patchset #2 (id:20001) manually as
f6b96b3d07879172f084cd3ae4ead4f337cb21a6 (presubmit successful).