[SVG2] Allow leading and trailing whitespace in svg attributes

Source/core/svg/SVGLength.cpp

Index: Source/core/svg/SVGLength.cpp
diff --git a/Source/core/svg/SVGLength.cpp b/Source/core/svg/SVGLength.cpp
index 0fe1202a1c2e4d68acaa361060d8a8b5352a8c0c..ba4e00306833d07a117847440b29f4394ab0d009 100644
--- a/Source/core/svg/SVGLength.cpp
+++ b/Source/core/svg/SVGLength.cpp
@@ -73,32 +73,41 @@ SVGLengthType stringToLengthType(const CharType*& ptr, const CharType* end)
     if (ptr == end)
         return LengthTypeNumber;
 
-    const UChar firstChar = *ptr;
-
-    if (++ptr == end)
-        return firstChar == '%' ? LengthTypePercentage : LengthTypeUnknown;
-
-    const UChar secondChar = *ptr;
-
-    if (++ptr != end)
-        return LengthTypeUnknown;
-
-    if (firstChar == 'e' && secondChar == 'm')
-        return LengthTypeEMS;
-    if (firstChar == 'e' && secondChar == 'x')
-        return LengthTypeEXS;
-    if (firstChar == 'p' && secondChar == 'x')
-        return LengthTypePX;
-    if (firstChar == 'c' && secondChar == 'm')
-        return LengthTypeCM;
-    if (firstChar == 'm' && secondChar == 'm')
-        return LengthTypeMM;
-    if (firstChar == 'i' && secondChar == 'n')
-        return LengthTypeIN;
-    if (firstChar == 'p' && secondChar == 't')
-        return LengthTypePT;
-    if (firstChar == 'p' && secondChar == 'c')
-        return LengthTypePC;
+    SVGLengthType type = LengthTypeUnknown;
+    const CharType firstChar = *ptr++;
+
+    if (firstChar == '%') {
+        type = LengthTypePercentage;
+    } else if (isHTMLSpace<CharType>(firstChar)) {
+        type = LengthTypeNumber;
+    } else if (ptr < end) {
+        const CharType secondChar = *ptr++;
+
+        if (firstChar == 'p') {
+            if (secondChar == 'x')
+                type = LengthTypePX;
+            if (secondChar == 't')
+                type = LengthTypePT;
+            if (secondChar == 'c')
+                type = LengthTypePC;
+        } else if (firstChar == 'e') {
+            if (secondChar == 'm')
+                type = LengthTypeEMS;
+            if (secondChar == 'x')
+                type = LengthTypeEXS;
+        } else if (firstChar == 'c' && secondChar == 'm') {
+            type = LengthTypeCM;
+        } else if (firstChar == 'm' && secondChar == 'm') {
+            type = LengthTypeMM;
+        } else if (firstChar == 'i' && secondChar == 'n') {
+            type = LengthTypeIN;
+        } else if (isHTMLSpace<CharType>(firstChar) && isHTMLSpace<CharType>(secondChar)) {
+            type = LengthTypeNumber;
+        }
+    }
+
+    if (!skipOptionalSVGSpaces(ptr, end))
+        return type;
 
     return LengthTypeUnknown;
 }
@@ -189,7 +198,7 @@ static bool parseValueInternal(const String& string, float& convertedNumber, SVG
     const CharType* ptr = string.getCharacters<CharType>();
     const CharType* end = ptr + string.length();
 
-    if (!parseNumber(ptr, end, convertedNumber, false))
+    if (!parseNumber(ptr, end, convertedNumber, AllowLeadingWhitespace))
         return false;
 
     type = stringToLengthType(ptr, end);