Enable Emoji Fitzpatrick modifier sequences

third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaperTest.cpp

Index: third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaperTest.cpp b/third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
index a0191534596c04371bafae352b60ec76d1d3e5c9..cac30b86b0e0fdbc292324a7700fc47461e668d6 100644
--- a/third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
+++ b/third_party/WebKit/Source/platform/fonts/shaping/CachingWordShaperTest.cpp
@@ -351,6 +351,25 @@ TEST_F(CachingWordShaperTest, SegmentEmojiHeartZWJSequence)
     ASSERT_FALSE(iterator.next(&wordResult));
 }
 
+TEST_F(CachingWordShaperTest, SegmentEmojiSignsOfHornsModifier)
+{
+    // A Sign of the Horns emoji, followed by a fitzpatrick modifer
+    const UChar str[] = {
+        0xD83E, 0xDD18,
+        0xD83C, 0xDFFB,
+        0x0
+    };
+    TextRun textRun(str, 4);
+
+    RefPtr<ShapeResult> wordResult;
+    CachingWordShapeIterator iterator(cache.get(), textRun, &font);
+
+    ASSERT_TRUE(iterator.next(&wordResult));
+    EXPECT_EQ(4u, wordResult->numCharacters());
+
+    ASSERT_FALSE(iterator.next(&wordResult));
+}
+
 TEST_F(CachingWordShaperTest, SegmentEmojiExtraZWJPrefix)
 {
     // A ZWJ, followed by a family and a heart-kiss sequence.