Bug 1744152 - Make the aAllUpperCase parameter of TransformString more generic. r=jfkthame

Bug 1744009 will stop creating frames for <option>s, but will need to
support text-transform on the option strings to calculate the right
intrinsic size for the <select> element.

The reason why we want to calculate the intrinsic size without having
into account the option styles is so that changing the selected option
doesn't change the width of the combobox, which is something that can
happen now.

This is similar to:

  https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/layout/layout_box.cc;l=307;drc=32f574f6df1d37b0d9ed765fe138270414d79e49

This patch will allow to achieve this (and not regress tests like
html/rendering/non-replaced-elements/form-controls/text-transform.html.ini).

Differential Revision: https://phabricator.services.mozilla.com/D132746

layout/generic/nsTextFrame.cpp

@@ -9985,7 +9985,7 @@ static void TransformChars(nsTextFrame* aFrame, const nsStyleText* aStyle,
       AutoTArray<bool, 50> charsToMergeArray;
       AutoTArray<bool, 50> deletedCharsArray;
       nsCaseTransformTextRunFactory::TransformString(
-          fragString, convertedString, /* aAllUppercase = */ false,
+          fragString, convertedString, /* aGlobalTransform = */ Nothing(),
           /* aCaseTransformsOnly = */ true, nullptr, charsToMergeArray,
           deletedCharsArray, transformedTextRun, aSkippedOffset);
       aOut.Append(convertedString);