Match <area shape> ASCII case-insensitively

third_party/WebKit/Source/wtf/text/StringImpl.cpp

Index: third_party/WebKit/Source/wtf/text/StringImpl.cpp
diff --git a/third_party/WebKit/Source/wtf/text/StringImpl.cpp b/third_party/WebKit/Source/wtf/text/StringImpl.cpp
index 2a46f3bd482aa5d3d99a3b1a9e18955fae4d171e..a282e2a502e13827b293ba4d1381f53fd9f35607 100644
--- a/third_party/WebKit/Source/wtf/text/StringImpl.cpp
+++ b/third_party/WebKit/Source/wtf/text/StringImpl.cpp
@@ -2276,6 +2276,34 @@ bool equalIgnoringNullity(StringImpl* a, StringImpl* b)
     return equal(a, b);
 }
 
+bool equalIgnoringASCIICase(const StringImpl* a, const StringImpl* b)
+{
+    if (!a || !b)
+        return !a == !b;
+    unsigned length = b->length();
+    if (a->length() != length)
+        return false;
+    if (a->is8Bit()) {
+        if (b->is8Bit())
+            return equalIgnoringASCIICase(a->characters8(), b->characters8(), length);
+        return equalIgnoringASCIICase(a->characters8(), b->characters16(), length);
+    }
+    if (b->is8Bit())
+        return equalIgnoringASCIICase(a->characters16(), b->characters8(), length);
+    return equalIgnoringASCIICase(a->characters16(), b->characters16(), length);
+}
+
+bool equalIgnoringASCIICase(const StringImpl* a, const LChar* b)
+{
+    if (!a || !b)
+        return !a == !b;
+    size_t length = strlen(reinterpret_cast<const char*>(b));
+    RELEASE_ASSERT(length <= numeric_limits<unsigned>::max());
+    if (length != a->length())
+        return false;
+    return equalSubstringIgnoringASCIICase(a, 0, b, length);
+}
+
 size_t StringImpl::sizeInBytes() const
 {
     size_t size = length();