Avoid copying strings when parsing CSS colors on the slow path.

third_party/WebKit/Source/platform/graphics/Color.cpp

Index: third_party/WebKit/Source/platform/graphics/Color.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/Color.cpp b/third_party/WebKit/Source/platform/graphics/Color.cpp
index 39cfb207752d0d7e92121e34e654c88f9d839228..cc973b6447b1a5ca3d45bb8a9530db6827630bd9 100644
--- a/third_party/WebKit/Source/platform/graphics/Color.cpp
+++ b/third_party/WebKit/Source/platform/graphics/Color.cpp
@@ -167,11 +167,9 @@ bool Color::parseHexColor(const UChar* name, unsigned length, RGBA32& rgb)
     return parseHexColorInternal(name, length, rgb);
 }
 
-bool Color::parseHexColor(const String& name, RGBA32& rgb)
+bool Color::parseHexColor(const StringView& name, RGBA32& rgb)
 {
-    unsigned length = name.length();
-
-    if (!length)
+    if (name.isEmpty())
         return false;
     if (name.is8Bit())
         return parseHexColor(name.characters8(), name.length(), rgb);