Add support for arbitrarily transformed Windows buttons text field...

Add support for arbitrarily transformed Windows buttons text fields, and select boxes (but does not affect scroll bars). I created a helper class, ThemeHelperWin, which automatically wraps the logic necessary to do this. There are three modes: draw the form control normally, draw it at a different size (for scaling, just tell Windows it's a different size and don't transform the graphics coordinates), or arbitrary transforms (where it's drawn to an offscreen buffer and transformed by our graphics layer.  

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=4890

[brettw, 2008-11-01 16:17:31]

This is the theme-specific part of my previous graphics patch, updated for the
new graphics layout. It it cleaner since ImageBuffer is cleaned up and we can
use it directly.

[M-A Ruel, 2008-11-03 20:18:46]

lgtm

http://codereview.chromium.org/9008/diff/6/8
File webkit/port/platform/graphics/ThemeHelperWin.cpp (right):

http://codereview.chromium.org/9008/diff/6/8#newcode33
Line 33: static void IntRectToRECT(const IntRect& ir, RECT* r)
I guess we can't use operator RECT() because it's in PLATFORM(WIN) ?

http://codereview.chromium.org/9008/diff/6/7
File webkit/port/platform/graphics/ThemeHelperWin.h (right):

http://codereview.chromium.org/9008/diff/6/7#newcode47
Line 47: // Use the original canvas with no changes. This is the normal mode
.

http://codereview.chromium.org/9008/diff/6/7#newcode54
Line 54: // it. This usually looke better.
look

http://codereview.chromium.org/9008/diff/6/7#newcode59
Line 59: COPY
,

http://codereview.chromium.org/9008/diff/6/7#newcode87
Line 87: // When type_ == COPY, this will be a new surface owned by this class
that
m_type