Make input placeholder line-height declaration !important

https://bugs.webkit.org/show_bug.cgi?id=240225

Reviewed by Tim Nguyen.

Source/WebCore:

This is the same the changes made in chromium at
https://chromium-review.googlesource.com/c/chromium/src/+/3594234
and Firefox change at
https://phabricator.services.mozilla.com/D116907

* css/html.css:
(input::placeholder):

LayoutTests:

Unskip the test that passes.
* TestExpectations:

Canonical link: https://commits.webkit.org/250414@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@293976 268f45cc-cd09-0410-ab3c-d52691b4dbfc

LayoutTests/ChangeLog

@@ -1,3 +1,13 @@
+2022-05-09  Ziran Sun  <zsun@igalia.com>
+
+        Make input placeholder line-height declaration !important
+        https://bugs.webkit.org/show_bug.cgi?id=240225
+
+        Reviewed by Tim Nguyen.
+
+        Unskip the test that passes. 
+        * TestExpectations:
+
 2022-05-09  Antoine Quint  <graouts@apple.com>
 
         REGRESSION (r291817): NativeImage passed to RemoteResourceCacheProxy::recordNativeImageUse may be null

LayoutTests/TestExpectations

@@ -662,7 +662,6 @@ imported/w3c/web-platform-tests/html/browsers/windows/iframe-cross-origin-print.
 imported/w3c/web-platform-tests/html/editing/editing-0/spelling-and-grammar-checking/spelling-markers-008.html [ ImageOnlyFailure ]
 imported/w3c/web-platform-tests/html/editing/editing-0/spelling-and-grammar-checking/spelling-markers-010.html [ ImageOnlyFailure ]
 imported/w3c/web-platform-tests/html/rendering/bindings/the-select-element-0/option-label.html [ ImageOnlyFailure ]
-imported/w3c/web-platform-tests/html/rendering/non-replaced-elements/form-controls/input-placeholder-line-height.html [ ImageOnlyFailure ]
 imported/w3c/web-platform-tests/html/rendering/non-replaced-elements/lists/li-type-unsupported-lower-alpha.html [ ImageOnlyFailure ]
 imported/w3c/web-platform-tests/html/rendering/non-replaced-elements/lists/li-type-unsupported-lower-roman.html [ ImageOnlyFailure ]
 imported/w3c/web-platform-tests/html/rendering/non-replaced-elements/lists/li-type-unsupported-upper-alpha.html [ ImageOnlyFailure ]

Source/WebCore/ChangeLog

@@ -1,3 +1,18 @@
+2022-05-09  Ziran Sun  <zsun@igalia.com>
+
+        Make input placeholder line-height declaration !important
+        https://bugs.webkit.org/show_bug.cgi?id=240225
+
+        Reviewed by Tim Nguyen.
+
+        This is the same the changes made in chromium at
+        https://chromium-review.googlesource.com/c/chromium/src/+/3594234
+        and Firefox change at
+        https://phabricator.services.mozilla.com/D116907
+
+        * css/html.css:
+        (input::placeholder):
+
 2022-05-09  Antoine Quint  <graouts@apple.com>
 
         REGRESSION (r291817): NativeImage passed to RemoteResourceCacheProxy::recordNativeImageUse may be null

Source/WebCore/css/html.css

@@ -768,7 +768,7 @@ input::placeholder {
     white-space: pre;
     word-wrap: normal;
     overflow: hidden;
-    line-height: initial;
+    line-height: initial !important;
 }
 
 input:is([type="hidden"], [type="image"], [type="file"]) {