1 files changed, 58 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/layout/layout_flexible_box_test.cc b/chromium/third_party/blink/renderer/core/layout/layout_flexible_box_test.cc
index 07853d0ae57..ffd365643b8 100644
--- a/chromium/third_party/blink/renderer/core/layout/layout_flexible_box_test.cc
+++ b/chromium/third_party/blink/renderer/core/layout/layout_flexible_box_test.cc
@@ -509,4 +509,62 @@ TEST_P(LayoutFlexibleBoxTest, ResizedFlexChildRequiresVisualOverflowRecalc) {
             PhysicalRect(0, 0, 105, 960));
 }
 
+TEST_P(LayoutFlexibleBoxTest, PercentDefiniteGapUseCounter) {
+  SetBodyInnerHTML(CommonStyle() + R"HTML(
+    <div id="flex-box" style="gap: 20%;"></div>
+  )HTML");
+  RunDocumentLifecycle();
+
+  EXPECT_TRUE(GetDocument().IsUseCounted(WebFeature::kFlexGapPositive));
+  EXPECT_TRUE(GetDocument().IsUseCounted(WebFeature::kFlexGapSpecified));
+  EXPECT_TRUE(GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercent));
+  EXPECT_FALSE(
+      GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercentIndefinite));
+}
+
+TEST_P(LayoutFlexibleBoxTest, PercentIndefiniteGapUseCounter) {
+  SetBodyInnerHTML(CommonStyle() + R"HTML(
+    <div style="display: flex; row-gap: 20%;"></div>
+  )HTML");
+  RunDocumentLifecycle();
+
+  EXPECT_FALSE(GetDocument().IsUseCounted(WebFeature::kFlexGapPositive));
+  EXPECT_TRUE(GetDocument().IsUseCounted(WebFeature::kFlexGapSpecified));
+  EXPECT_TRUE(GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercent));
+  EXPECT_TRUE(
+      GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercentIndefinite));
+}
+
+TEST_P(LayoutFlexibleBoxTest, ZeroGapUseCounter) {
+  SetBodyInnerHTML(CommonStyle() + R"HTML(
+    <div style="display: flex; gap: 0;"></div>
+  )HTML");
+  RunDocumentLifecycle();
+
+  EXPECT_FALSE(GetDocument().IsUseCounted(WebFeature::kFlexGapPositive));
+  EXPECT_TRUE(GetDocument().IsUseCounted(WebFeature::kFlexGapSpecified));
+  EXPECT_FALSE(GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercent));
+  EXPECT_FALSE(
+      GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercentIndefinite));
+}
+
+TEST_P(LayoutFlexibleBoxTest, NormalGapUseCounter) {
+  // 'normal' is the initial value. It resolves to non-zero for multi-col but 0
+  // for flex.
+  SetBodyInnerHTML(CommonStyle() + R"HTML(
+    <div style="display: flex; gap: normal"></div>
+    <div style="display: flex; gap: auto"></div>
+    <div style="display: flex; gap: initial"></div>
+    <div style="display: flex; gap: -10px"></div>
+    <div style="display: flex; gap: 1hz"></div>
+  )HTML");
+  RunDocumentLifecycle();
+
+  EXPECT_FALSE(GetDocument().IsUseCounted(WebFeature::kFlexGapPositive));
+  EXPECT_FALSE(GetDocument().IsUseCounted(WebFeature::kFlexGapSpecified));
+  EXPECT_FALSE(GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercent));
+  EXPECT_FALSE(
+      GetDocument().IsUseCounted(WebFeature::kFlexRowGapPercentIndefinite));
+}
+
 }  // namespace blink