Fixed Mac gyp build. Switched to using Chrome hash_tables.h, changed...

command_buffer/command_buffer.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common.gypi',
   ],
   'target_defaults': {
     'include_dirs': [
       '..',
       '../..',
       '../../<(gtestdir)',
       '../../<(nacldir)',
     ],
+    # TODO(rlp): remove this after fixing signed / unsigned issues in
+    # command buffer code and tests.
+    'target_conditions': [
+      ['OS == "mac"',
+        {
+          'xcode_settings': {
+            'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO'
+          },
+        },
+      ],
+    ],
   },
   'targets': [
     {
       'target_name': 'command_buffer_common',
       'type': 'static_library',
       'dependencies': [
         '../../native_client/src/shared/imc/imc.gyp:google_nacl_imc',
         '../../native_client/src/shared/imc/imc.gyp:libgoogle_nacl_imc_c',
         '../../native_client/src/shared/platform/platform.gyp:platform',
         '../../native_client/src/trusted/desc/desc.gyp:nrd_xfer',
@@ skipping 90 matching lines @@
               'VCCLCompilerTool': {
                 'ForcedIncludeFiles':
                 'command_buffer/service/cross/precompile.h',
               },
             },
           },
         ],
         ['OS == "mac"',
           {
             'xcode_settings': {
-              'GCC_PREFIX_HEADER': 'command_buffer/service/cross/precompile.h',
+              'GCC_PREFIX_HEADER': 'service/cross/precompile.h',
             },
           },
         ],
         ['OS == "linux"',
           {
             'cflags': [
               '-include',
               'command_buffer/service/cross/precompile.h',
             ],
           },
@@ skipping 65 matching lines @@
         'sources': [
           'service/cross/buffer_rpc_test.cc',
           'service/cross/cmd_buffer_engine_test.cc',
           'service/cross/cmd_parser_test.cc',
           'service/cross/resource_test.cc',
         ],
       },
     },
   ],  # 'targets'
 }