Add sanbdoxed_pages to allow extension/app pages to be served in a sandboxed, unique origin

chrome/common/extensions/extension_set.cc

Index: chrome/common/extensions/extension_set.cc
diff --git a/chrome/common/extensions/extension_set.cc b/chrome/common/extensions/extension_set.cc
index 1eb931cf5e66bb98bedc75189b9bbe61489eb51a..22f0ed22d1f81724be7da91523aa4c758ba8306c 100644
--- a/chrome/common/extensions/extension_set.cc
+++ b/chrome/common/extensions/extension_set.cc
@@ -128,7 +128,7 @@ const Extension* ExtensionSet::GetByID(const std::string& id) const {
 
 bool ExtensionSet::ExtensionBindingsAllowed(
     const ExtensionURLInfo& info) const {
-  if (info.origin().isUnique())
+  if (info.origin().isUnique() || IsSandboxedPage(info))
     return false;
 
   if (info.url().SchemeIs(chrome::kExtensionScheme))
@@ -143,3 +143,16 @@ bool ExtensionSet::ExtensionBindingsAllowed(
 
   return false;
 }
+
+bool ExtensionSet::IsSandboxedPage(const ExtensionURLInfo& info) const {
+  if (info.origin().isUnique())
+    return true;
+
+  if (info.url().SchemeIs(chrome::kExtensionScheme)) {
+    const Extension* extension = GetByID(info.url().host());
+    if (extension) {
+      return extension->IsSandboxedPage(info.url().path());
+    }
+  }
+  return false;
+}