Use HTTP response headers for PNaCl caching instead of bitcode hash.

ppapi/ppapi_tests.gypi

 # Copyright (c) 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'ppapi_tests',
       'type': 'loadable_module',
       'include_dirs': [
@@ skipping 134 matching lines @@
         'ppapi_unittest_shared',
         '../base/base.gyp:test_support_base',
         '../gpu/gpu.gyp:gpu_ipc',
         '../ipc/ipc.gyp:ipc',
         '../ipc/ipc.gyp:test_support_ipc',
         '../media/media.gyp:shared_memory_support',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../ui/surface/surface.gyp:surface',
       ],
+      # For the nacl_http_response_headers_unittest below.
+      'include_dirs': [
+        '../ppapi',
+      ],
       'sources': [
         'proxy/run_all_unittests.cc',
 
         'host/resource_message_filter_unittest.cc',
+        # Piggy back on ppapi_unittests for a simple NaCl unittest,
+        # which must not have dependencies on anything other than stdlibs.
+        # We add the source file, not just the test to ensure that the object
+        # is built.  Otherwise, we would need to depend on the NaCl trusted
+        # plugin being built to build the object.
+        # TODO(jvoung): move this to unit_tests instead of ppapi_unittests
+        # once this moves into chrome.
+        'native_client/src/trusted/plugin/nacl_http_response_headers.cc',
+        'native_client/src/trusted/plugin/nacl_http_response_headers_unittest.cc',
         'proxy/device_enumeration_resource_helper_unittest.cc',
         'proxy/file_chooser_resource_unittest.cc',
         'proxy/flash_resource_unittest.cc',
         'proxy/mock_resource.cc',
         'proxy/mock_resource.h',
         'proxy/pdf_resource_unittest.cc',
         'proxy/plugin_dispatcher_unittest.cc',
         'proxy/plugin_resource_tracker_unittest.cc',
         'proxy/plugin_var_tracker_unittest.cc',
         'proxy/ppb_var_unittest.cc',
@@ skipping 339 matching lines @@
         'ppapi.gyp:ppapi_cpp',
       ],
       'sources': [
         'examples/printing/printing.cc',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }