https://bugs.webkit.org/show_bug.cgi?id=120865
<rdar://problem/11571240>

Reviewed by Simon Fraser.

Allow RenderTheme to force the height of a <progress> bar.

Test: platform/mac/fast/forms/indeterminate-progress-inline-height.html

* rendering/RenderProgress.cpp:
(WebCore::RenderProgress::computeLogicalHeight):
Borrowed from RenderMeter, allow the theme to override the size of the progress bar.

* rendering/RenderProgress.h:
Drive-by add OVERRIDE to a few things.

* rendering/RenderTheme.cpp:
(WebCore::RenderTheme::progressBarRectForBounds):
* rendering/RenderTheme.h:
Add a default implementation of progressBarRectForBounds that just passes the bounds through.

* rendering/RenderThemeMac.h:
* rendering/RenderThemeMac.mm:
(WebCore::RenderThemeMac::progressBarRectForBounds):
Override progressBarRectForBounds; the implementation is factored out of paintProgressBar.

(WebCore::RenderThemeMac::paintProgressBar):
Make use of the factored-out progressBarRectForBounds().

Drive-by apply the device scale factor to the progress bar's image buffer,
so that it is rendered at 2x on appropriate hardware. Also, multiply the
progress animation phase by the device scale factor, as the phase value seems
to be proportional to the actual pixel offset of the animation; without this,
the animation would appear to progress half as slowly in HiDPI.

Add a Mac-specific test that an unstyled indeterminate progress bar
overrides its specified height with its fixed system height.

* platform/mac/fast/forms/indeterminate-progress-inline-height-expected.txt: Added.
* platform/mac/fast/forms/indeterminate-progress-inline-height.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155460 268f45cc-cd09-0410-ab3c-d52691b4dbfc