Change pnacl to read all resources from the extension.

ppapi/native_client/src/trusted/plugin/plugin.cc

Index: ppapi/native_client/src/trusted/plugin/plugin.cc
===================================================================
--- ppapi/native_client/src/trusted/plugin/plugin.cc	(revision 115018)
+++ ppapi/native_client/src/trusted/plugin/plugin.cc	(working copy)
@@ -866,7 +866,10 @@
 
 const char* const Plugin::kNaClMIMEType = "application/x-nacl";
 
-bool Plugin::IsForeignMIMEType() const {
+bool Plugin::NexeIsContentHandler() const {
+  // Tests if the MIME type is not a NaCl MIME type.
+  // If the MIME type is foreign, then this NEXE is being used as a content
+  // type handler rather than directly by an HTML document.
   return
       !mime_type().empty() &&
       mime_type() != kNaClMIMEType;
@@ -936,10 +939,14 @@
     }
 
     const char* manifest_url = LookupArgument(kSrcManifestAttribute);
-    // If the MIME type is foreign, then 'src' will be the URL for the content
-    // and 'nacl' will be the URL for the manifest.
-    if (IsForeignMIMEType()) {
+    if (NexeIsContentHandler()) {
+      // For content handlers 'src' will be the URL for the content
+      // and 'nacl' will be the URL for the manifest.
       manifest_url = LookupArgument(kNaClManifestAttribute);
+      // For content handlers the NEXE runs in the security context of the
+      // content it is rendering and the NEXE itself appears to be a
+      // cross-origin resource stored in a Chrome extension.  We request
+      // universal access during the NEXE load so that we can read the NEXE.
     }
     // Use the document URL as the base for resolving relative URLs to find the
     // manifest.  This takes into account the setting of <base> tags that
@@ -1636,6 +1643,7 @@
       CHECK(
           nexe_downloader_.Open(program_url,
                                 DOWNLOAD_TO_FILE,
+                                NexeIsContentHandler(),
                                 open_callback,
                                 &UpdateDownloadProgress));
       return;
@@ -1677,6 +1685,7 @@
     // Will always call the callback on success or failure.
     CHECK(nexe_downloader_.Open(nmf_resolved_url.AsString(),
                                 DOWNLOAD_TO_BUFFER,
+                                NexeIsContentHandler(),
                                 open_callback,
                                 NULL));
   } else {
@@ -1685,6 +1694,7 @@
     // Will always call the callback on success or failure.
     CHECK(nexe_downloader_.Open(nmf_resolved_url.AsString(),
                                 DOWNLOAD_TO_FILE,
+                                NexeIsContentHandler(),
                                 open_callback,
                                 NULL));
   }
@@ -1755,8 +1765,10 @@
 
 
 bool Plugin::StreamAsFile(const nacl::string& url,
+                          bool permits_extension_urls,
                           PP_CompletionCallback callback) {
-  PLUGIN_PRINTF(("Plugin::StreamAsFile (url='%s')\n", url.c_str()));
+  PLUGIN_PRINTF(("Plugin::StreamAsFile (url='%s', permits_extension_urls=%d)\n",
+                 url.c_str(), permits_extension_urls));
   FileDownloader* downloader = new FileDownloader();
   downloader->Initialize(this);
   url_downloaders_.insert(downloader);
@@ -1777,6 +1789,7 @@
   // If true, will always call the callback on success or failure.
   return downloader->Open(url,
                           DOWNLOAD_TO_FILE,
+                          permits_extension_urls || NexeIsContentHandler(),
                           open_callback,
                           &UpdateDownloadProgress);
 }