Add cross-origin loading of NEXEs for MIME type handlers

tests/ppapi_bad/ppapi_bad.html

Index: tests/ppapi_bad/ppapi_bad.html
===================================================================
--- tests/ppapi_bad/ppapi_bad.html	(revision 4887)
+++ tests/ppapi_bad/ppapi_bad.html	(working copy)
@@ -25,9 +25,41 @@
       style="background-color:gray"
       type="application/x-nacl" />
     <br>NaCl module load failed: could not load url.<br>
+    <!-- This load would have succeeded if the NEXE was from a chrome-extension
+    URL and NaCl had been registered as handling the PDF MIME type using the
+    nacl_modules attribute in a Chrome extension manifest.)-->
     <embed id="naclModule"
       name="naclModule"
       width=100 height=20
+      src="http://www.google.com/crossorigin.nexe"
+      style="background-color:gray"
+      type="application/pdf" />
+    <br>NaCl module load failed: could not load url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
+      src="http://www.google.com/crossorigin.nexe"
+      style="background-color:gray"
+      type="application/pdf"
+      type="application/x-nacl" />
+    <br>NaCl module load failed: could not load url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
+      src="http://www.google.com/crossorigin.nexe"
+      style="background-color:gray"
+      type="application/x-nacl"
+      type="application/pdf" />
+    <br>NaCl module load failed: could not load url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
+      src="http://www.google.com/crossorigin.nexe"
+      style="background-color:gray" />
+    <br>NaCl module load failed: could not load url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
       src="doesnotexist.nexe"
       style="background-color:gray"
       type="application/x-nacl" />
@@ -42,6 +74,35 @@
     <embed id="naclModule"
       name="naclModule"
       width=100 height=20
+      nacl="http://www.google.com/crossorigin.manifest"
+      style="background-color:gray"
+      type="application/pdf" />
+    <br>NaCl module load failed: could not load manifest url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
+      nacl="http://www.google.com/crossorigin.manifest"
+      style="background-color:gray" />
+    <br>NaCl module load failed: could not load manifest url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
+      nacl="http://www.google.com/crossorigin.manifest"
+      style="background-color:gray"
+      type="application/pdf"
+      type="application/x-nacl" />
+    <br>NaCl module load failed: could not load manifest url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
+      nacl="http://www.google.com/crossorigin.manifest"
+      style="background-color:gray"
+      type="application/x-nacl"
+      type="application/pdf" />
+    <br>NaCl module load failed: could not load manifest url.<br>
+    <embed id="naclModule"
+      name="naclModule"
+      width=100 height=20
       nacl="doesnotexist.manifest"
       style="background-color:gray"
       type="application/x-nacl" />