Refine PNaCl pexe fetch UMA errors to know if the user aborted, etc.

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

 /*
  * Copyright (c) 2011 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * Error codes and data structures used to report errors when loading a nexe.
  */
 
@@ skipping 66 matching lines @@
   ERROR_PNACL_CACHE_FILEOPEN_OTHER = 49,
   ERROR_PNACL_CACHE_FETCH_NOACCESS = 50,
   ERROR_PNACL_CACHE_FETCH_NOTFOUND = 51,
   ERROR_PNACL_CACHE_FETCH_OTHER = 52,
   ERROR_PNACL_CACHE_FINALIZE_COPY_NOQUOTA = 53,
   ERROR_PNACL_CACHE_FINALIZE_COPY_NOSPACE = 54,
   ERROR_PNACL_CACHE_FINALIZE_COPY_OTHER = 55,
   ERROR_PNACL_CACHE_FINALIZE_RENAME_NOACCESS = 56,
   ERROR_PNACL_CACHE_FINALIZE_RENAME_OTHER = 57,
   ERROR_PNACL_RESOURCE_FETCH = 58,
-  ERROR_PNACL_PEXE_FETCH = 59,
-  ERROR_PNACL_THREAD_CREATE = 60,
-  ERROR_PNACL_LLC_SETUP = 61,
-  ERROR_PNACL_LD_SETUP = 62,
-  ERROR_PNACL_LLC_INTERNAL = 63,
-  ERROR_PNACL_LD_INTERNAL = 64,
-  ERROR_PNACL_CREATE_TEMP = 65,
+  ERROR_PNACL_PEXE_FETCH_ABORTED = 59,
+  ERROR_PNACL_PEXE_FETCH_NOACCESS = 60,
+  ERROR_PNACL_PEXE_FETCH_OTHER = 61,
+  ERROR_PNACL_THREAD_CREATE = 62,
+  ERROR_PNACL_LLC_SETUP = 63,
+  ERROR_PNACL_LD_SETUP = 64,
+  ERROR_PNACL_LLC_INTERNAL = 65,
+  ERROR_PNACL_LD_INTERNAL = 66,
+  ERROR_PNACL_CREATE_TEMP = 67,
   // Remove this next code when pnacl is no longer behind a flag (when we
   // remove the --enable-pnacl flag).
-  ERROR_PNACL_NOT_ENABLED = 66,
+  ERROR_PNACL_NOT_ENABLED = 68,
   // If you add a code, read the enum comment above on how to update histograms.
   ERROR_MAX
 };
 
 class ErrorInfo {
  public:
   ErrorInfo() {
     Reset();
   }
 
@@ skipping 20 matching lines @@
 
  private:
   PluginErrorCode error_code_;
   std::string message_;
   NACL_DISALLOW_COPY_AND_ASSIGN(ErrorInfo);
 };
 
 }  // namespace plugin
 
 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_ERROR_H