Fix "implements in RHS file"

Fix "implements in RHS file"

Recent CL broke run-bindings-tests on my machine:
Move modules-dependent IDL statements out of core by supporting 'implements' in RHS interface
https://codereview.chromium.org/270573005/

This is due to depending on order of files;
this is fixed by doing the moving/merging in a separate, global phase
(which we're already doing).

Also:
* Adds a test case.
* Fixes unaddressed nits.

R=haraken
BUG=358074
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=173613

[Nils Barth (inactive), 2014-05-08 06:31:44]

https://codereview.chromium.org/270823002/diff/1/Source/bindings/scripts/comp...
File Source/bindings/scripts/compute_interfaces_info.py (left):

https://codereview.chromium.org/270823002/diff/1/Source/bindings/scripts/comp...
Source/bindings/scripts/compute_interfaces_info.py:197: interface_info =
interfaces_info[left_interface_name]
This fails with
KeyError: 'Window'
...on r-b-t for me, because Window appears on the rhs before we've reached it.

https://codereview.chromium.org/270823002/diff/1/Source/bindings/scripts/comp...
File Source/bindings/scripts/compute_interfaces_info.py (right):

https://codereview.chromium.org/270823002/diff/1/Source/bindings/scripts/comp...
Source/bindings/scripts/compute_interfaces_info.py:257: del
interface_info['implemented_by_interfaces']
We *move* the info, not just copying it, which means moving 'implements' doesn't
even trigger a rebuild!

[haraken, 2014-05-08 06:56:16]

LGTM

[Nils Barth (inactive), 2014-05-08 06:59:17]

The CQ bit was checked by nbarth@chromium.org

[commit-bot: I haz the power, 2014-05-08 06:59:55]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/nbarth@chromium.org/270823002/1

[commit-bot: I haz the power, 2014-05-08 07:50:02]

Change committed as 173613