Tag SecurityContext objects as being hosted in reserved IP ranges.

Source/core/dom/DocumentInit.cpp

Index: Source/core/dom/DocumentInit.cpp
diff --git a/Source/core/dom/DocumentInit.cpp b/Source/core/dom/DocumentInit.cpp
index 1aa80ce299c02316582a410b315dbbbe9d8b6a63..1619d93ef3819d81171b98cb31391cadf2b7d40f 100644
--- a/Source/core/dom/DocumentInit.cpp
+++ b/Source/core/dom/DocumentInit.cpp
@@ -33,7 +33,9 @@
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/html/imports/HTMLImportsController.h"
+#include "core/loader/DocumentLoader.h"
 #include "platform/RuntimeEnabledFeatures.h"
+#include "public/platform/Platform.h"
 
 namespace blink {
 
@@ -123,6 +125,20 @@ bool DocumentInit::shouldEnforceStrictMixedContentChecking() const
     return frameForSecurityContext()->loader().shouldEnforceStrictMixedContentChecking();
 }
 
+bool DocumentInit::isHostedInReservedIPRange() const
+{
+    if (LocalFrame* frame = frameForSecurityContext()) {
+        // TODO: Fix the platform API to drop the KURL construction.

[jochen (gone - plz use gerrit), 2015/01/13 15:04:55]

it's FIXME in blink

[Mike West, 2015/01/13 15:35:38]

Done.

+        if (DocumentLoader* loader = frame->loader().provisionalDocumentLoader() ? frame->loader().provisionalDocumentLoader() : frame->loader().documentLoader()) {
+            if (!loader->response().remoteIPAddress().isEmpty()) {
+                KURL documentIP(ParsedURLString, "http://" + loader->response().remoteIPAddress());

[jochen (gone - plz use gerrit), 2015/01/13 15:04:54]

https:// - be a good role model :)

otoh, why does the api not take the string? seems odd to convert to URL for no
good reason

[Mike West, 2015/01/13 15:35:38]

Ha! Done.
Your humble API author is an idiot, basically. We don't need the KURL; we strip
it down to a host immediately upon passing it to Chromium. We did briefly use a
KURL for a naive version of this check earlier, but it's a waste now.

I was going to poke at this in a separate CL, but I guess it's just as easy to
fix it here. 

+                return Platform::current()->isReservedIPAddress(documentIP);
+            }
+        }
+    }
+    return false;
+}
+
 Settings* DocumentInit::settings() const
 {
     ASSERT(frameForSecurityContext());