Bug 1796044 - part 3: Make `intl.tsf.hack.atok.create_native_caret` a static pref r=m_kato

Depends on D159805

Differential Revision: https://phabricator.services.mozilla.com/D159806

modules/libpref/init/StaticPrefList.yaml

@@ -6868,6 +6868,13 @@
   mirror: always
 
 #ifdef XP_WIN
+  # Whether Gecko creates or does not create native caret for legacy ATOK
+  # (2011 - 2015).
+-   name: intl.tsf.hack.atok.create_native_caret
+    type: bool
+    value: true
+    mirror: always
+
   # Whether Gecko sets input scope of the URL bar to IS_DEFAULT when black
   # listed IMEs are active or does not.  If you use tablet mode mainly and you
   # want to use touch keyboard for URL when you set focus to the URL bar, you

modules/libpref/init/all.js

@@ -2552,8 +2552,6 @@ pref("font.size.monospace.x-math", 13);
 
   // Enables/Disables hack for specific TIP.
 
-  // Whether creates native caret for ATOK or not.
-  pref("intl.tsf.hack.atok.create_native_caret", true);
   // Whether use available composition string rect for result of
   // ITextStoreACP::GetTextExt() even if the specified range is same as the
   // range of composition string but some character rects of them are not

widget/windows/TSFTextStore.cpp

@@ -1753,8 +1753,6 @@ class TSFPrefs final {
     return s##aName##Value;                                                   \
   }
 
-  DECL_AND_IMPL_BOOL_PREF("intl.tsf.hack.atok.create_native_caret",
-                          NeedToCreateNativeCaretForLegacyATOK, true)
   DECL_AND_IMPL_BOOL_PREF(
       "intl.tsf.hack.atok.do_not_return_no_layout_error_of_composition_string",
       DoNotReturnNoLayoutErrorToATOKOfCompositionString, true)
@@ -4628,7 +4626,7 @@ TSFTextStore::GetTextExt(TsViewCookie vcView, LONG acpStart, LONG acpEnd,
   // even if we'll create native caret later, we need to creat it here with
   // current information.
   if (!IMEHandler::IsA11yHandlingNativeCaret() &&
-      TSFPrefs::NeedToCreateNativeCaretForLegacyATOK() &&
+      StaticPrefs::intl_tsf_hack_atok_create_native_caret() &&
       TSFStaticSink::IsATOKReferringNativeCaretActive() &&
       mComposition.isSome() &&
       mComposition->IsOffsetInRangeOrEndOffset(acpStart) &&
@@ -4786,7 +4784,7 @@ bool TSFTextStore::MaybeHackNoErrorLayoutBugs(LONG& aACPStart, LONG& aACPEnd) {
       // If we'll create native caret where we paint our caret.  Then, ATOK
       // will refer native caret.  So, we don't need to hack anything in
       // this case.
-      if (TSFPrefs::NeedToCreateNativeCaretForLegacyATOK()) {
+      if (StaticPrefs::intl_tsf_hack_atok_create_native_caret()) {
         MOZ_ASSERT(TSFStaticSink::IsATOKReferringNativeCaretActive());
         return false;
       }