Fix hard-coding of "about:srcdoc"

third_party/WebKit/Source/platform/weborigin/KURL.cpp

Index: third_party/WebKit/Source/platform/weborigin/KURL.cpp
diff --git a/third_party/WebKit/Source/platform/weborigin/KURL.cpp b/third_party/WebKit/Source/platform/weborigin/KURL.cpp
index 99af364f9470dda7bd7c13faab6132cfc5205bff..c430db079a7b515bbee32364d82f7560bb3e059d 100644
--- a/third_party/WebKit/Source/platform/weborigin/KURL.cpp
+++ b/third_party/WebKit/Source/platform/weborigin/KURL.cpp
@@ -186,6 +186,17 @@ bool KURL::isAboutBlankURL() const
     return *this == blankURL();
 }
 
+const KURL& srcdocURL()
+{
+    DEFINE_STATIC_LOCAL(KURL, staticSrcdocURL, (ParsedURLString, "about:srcdoc"));
+    return staticSrcdocURL;
+}
+
+bool KURL::isAboutSrcdocURL() const
+{
+    return *this == srcdocURL();
+}
+
 String KURL::elidedString() const
 {
     if (string().length() <= 1024)