MD WebUI: Fix minor rendering problems in <cr-toolbar>

MD WebUI: Fix minor rendering problems in <cr-toolbar>

In crrev.com/589355, the <cr-toolbar> element moved from using
paper-input to a native <input> element. This CL fixes two minor issues
that came about as a result of this change:

* Fix font rendering issues on macOS so that text is the right size and
  antialiased correctly
* Ensure that right clicking shows the <input> context menu
* Prevent label text from wrapping during animations

BUG=589355, 666183, 666180
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2502413003
Cr-Commit-Position: refs/heads/master@{#433107}
(cherry picked from commit 572f871f139ed9a514b69707a7e25345fff0de2b)

Committed: https://chromium.googlesource.com/chromium/src/+/8832b0411ba993c9a62ff52044767a5885d758ab

[tsergeant, 2016-11-20 23:27:38]

Description was changed from

==========
MD WebUI: Fix minor rendering problems in <cr-toolbar>

In crrev.com/589355, the <cr-toolbar> element moved from using
paper-input to a native <input> element. This CL fixes two minor issues
that came about as a result of this change:

* Fix font rendering issues on macOS so that text is the right size and
  antialiased correctly
* Ensure that right clicking shows the <input> context menu
* Prevent label text from wrapping during animations

BUG=589355,666183,666180
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2502413003
Cr-Commit-Position: refs/heads/master@{#433107}
(cherry picked from commit 572f871f139ed9a514b69707a7e25345fff0de2b)
==========

to

==========
MD WebUI: Fix minor rendering problems in <cr-toolbar>

In crrev.com/589355, the <cr-toolbar> element moved from using
paper-input to a native <input> element. This CL fixes two minor issues
that came about as a result of this change:

* Fix font rendering issues on macOS so that text is the right size and
  antialiased correctly
* Ensure that right clicking shows the <input> context menu
* Prevent label text from wrapping during animations

BUG=589355,666183,666180
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2502413003
Cr-Commit-Position: refs/heads/master@{#433107}
(cherry picked from commit 572f871f139ed9a514b69707a7e25345fff0de2b)

Committed:
https://chromium.googlesource.com/chromium/src/+/8832b0411ba993c9a62ff5204476...
==========

[tsergeant, 2016-11-20 23:27:43]

Committed patchset #1 (id:1) manually as
8832b0411ba993c9a62ff52044767a5885d758ab.