Fix experimental sub-pixel font scaling for webfonts on windows

The experimental sub-pixel scaling support on windows was broken for
webfonts by one of the many recent font refactorings.

This change reintroduces the functionality by having the
FontPlatformData constructors useSubpixelPositioning argument default
to the system default, as set by the font cache.

BUG=290411
R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/111283002

git-svn-id: svn://svn.chromium.org/blink/trunk@163574 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Write an update in run-webkit-tests before looking for crash logs.

Symbolizing crash stacks may take quite a while, so we should write
an update to the logger indicating that that's what we're doing.

R=jochen@chromium.org, eseidel@chromium.org
BUG=323875

Review URL: https://codereview.chromium.org/102953005

git-svn-id: svn://svn.chromium.org/blink/trunk@163575 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove setCaretRectangle() from InputMethodContext

As the setCaretRectangle() interface was removed from the spec,
delete the code.  As no one is using the interface,
no impact is expected.

BUG=238585
TEST=none

Review URL: https://codereview.chromium.org/111473002

git-svn-id: svn://svn.chromium.org/blink/trunk@163628 bbb929c8-8fbe-4397-9dbb-9b2b20218538