Omit unused code metadata from precompiled snapshots.

Omit nonessential code metadata from precompiled snapshots.

dart2js ARM -9.9% size

Before
VMIsolate(CodeSize): 2627828
Isolate(CodeSize): 11977642
Instructions(CodeSize): 12908480
Total(CodeSize): 27513950

After
VMIsolate(CodeSize): 2627206
Isolate(CodeSize): 9247198
Instructions(CodeSize): 12908512
Total(CodeSize): 24782916

BUG=
R=srdjan@google.com

Committed: https://github.com/dart-lang/sdk/commit/73b6080a6b26ad24380477c4a584edd6cb2e2ab5

[rmacnak, 2015-11-13 20:48:27]

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

[srdjan, 2015-11-13 21:14:02]

lgtm

https://codereview.chromium.org/1413763018/diff/40001/runtime/vm/raw_object_s...
File runtime/vm/raw_object_snapshot.cc (right):

https://codereview.chromium.org/1413763018/diff/40001/runtime/vm/raw_object_s...
runtime/vm/raw_object_snapshot.cc:754: if (!writer->snapshot_code()) {
ditto

[rmacnak, 2015-11-13 21:56:02]

https://codereview.chromium.org/1413763018/diff/40001/runtime/vm/raw_object_s...
File runtime/vm/raw_object_snapshot.cc (right):

https://codereview.chromium.org/1413763018/diff/40001/runtime/vm/raw_object_s...
runtime/vm/raw_object_snapshot.cc:754: if (!writer->snapshot_code()) {
On 2015/11/13 21:14:02, srdjan wrote:
> ditto

Done.

[rmacnak, 2015-11-13 21:56:26]

Committed patchset #3 (id:40001) manually as
73b6080a6b26ad24380477c4a584edd6cb2e2ab5 (presubmit successful).