Pepper: Move GetSandboxISA() to PPB_NaCl_Private.

ppapi/native_client/src/trusted/plugin/pnacl_resources.h

Index: ppapi/native_client/src/trusted/plugin/pnacl_resources.h
diff --git a/ppapi/native_client/src/trusted/plugin/pnacl_resources.h b/ppapi/native_client/src/trusted/plugin/pnacl_resources.h
index 263dcf6f2942f003b99ef23f9e1f96170ee57794..3363e17a397f494885ce63b62fb4b8500017f6a4 100644
--- a/ppapi/native_client/src/trusted/plugin/pnacl_resources.h
+++ b/ppapi/native_client/src/trusted/plugin/pnacl_resources.h
@@ -15,7 +15,6 @@
 #include "ppapi/c/private/pp_file_handle.h"
 #include "ppapi/cpp/completion_callback.h"
 
-#include "ppapi/native_client/src/trusted/plugin/nexe_arch.h"
 #include "ppapi/native_client/src/trusted/plugin/plugin_error.h"
 
 namespace plugin {
@@ -30,9 +29,6 @@ class PnaclUrls {
   // Get the base URL prefix for Pnacl resources (without platform prefix).
   static nacl::string GetBaseUrl();
 
-  // Return {platform_prefix}/url
-  static nacl::string PrependPlatformPrefix(const nacl::string& url);
-
   static bool IsPnaclComponent(const nacl::string& full_url);
   static nacl::string PnaclComponentURLToFilename(
       const nacl::string& full_url);
@@ -78,7 +74,8 @@ class PnaclResources {
     return ld_tool_name;
   }
 
-  nacl::string GetFullUrl(const nacl::string& partial_url) const;
+  nacl::string GetFullUrl(const nacl::string& partial_url,
+                          const nacl::string& sandbox_arch) const;
 
   // Get file descs by name. Only valid after StartLoad's completion callback
   // fired.