linux (and some posix): multiprocess plugins compiling.

chrome/chrome.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',
@@ skipping 1519 matching lines @@
         'renderer/webplugin_delegate_proxy.h',
         'renderer/webworker_proxy.cc',
         'renderer/webworker_proxy.h',
       ],
       'link_settings': {
         'mac_bundle_resources': [
           'renderer/renderer.sb',
         ],
       },
       'conditions': [
+        # Plugin code.
+        ['OS=="linux" or OS=="win"', {
+          'dependencies': [
+            'plugin',
+          ],
+        }],
+        # Linux-specific rules.
         ['OS=="linux"', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',
           ],
         }],
+        # Windows-specific rules.
         ['OS=="win"', {
           'include_dirs': [
             'third_party/wtl/include',
           ],
-          'dependencies': [
-            'plugin',
-          ],
         },],
+        # As of yet unported-from-Windows code.
         ['OS!="win"', {
           'sources!': [
-            'renderer/plugin_channel_host.cc',
-            'renderer/webplugin_delegate_proxy.cc',
             'renderer/webworker_proxy.cc',
             'renderer/webworker_proxy.h',
           ],
         },],
+        # As of yet unported-to-Mac code.
+        ['OS=="mac"', {
+          'sources!': [
+            'renderer/plugin_channel_host.cc',
+            'renderer/webplugin_delegate_proxy.cc',
+          ]
+        },],
       ],
     },
     {
       'target_name': 'app',
       'type': 'executable',
       'mac_bundle': 1,
       'dependencies': [
         'common',
         'browser',
         'renderer',
@@ skipping 1251 matching lines @@
                 'views/window/native_frame_view.cc',
                 'views/window/non_client_view.cc',
                 'views/window/window_delegate.cc',
                 'views/window/window_win.cc',
               ],
             }],
           ],
         },
       ],
     }], # OS=="win" or OS=="linux"
-    ['OS=="win"',
+    ['OS=="win" or OS=="linux"',
       { 'targets': [
         {
           'target_name': 'plugin',
           'type': '<(library)',
           'dependencies': [
             'common',
             'resources',
             '../media/media.gyp:media',
             '../skia/skia.gyp:skia',
             '../third_party/icu38/icu38.gyp:icui18n',
@@ skipping 37 matching lines @@
                 '__STD_C',
                 '_CRT_SECURE_NO_DEPRECATE',
                 '_SCL_SECURE_NO_DEPRECATE',
               ],
               'include_dirs': [
                 'third_party/wtl/include',
               ],
             },],
           ],
         },
+      ]},  # 'targets'
+    ],  # OS=="win" or OS=="linux"
+    ['OS=="win"',
+      { 'targets': [
         {
           'target_name': 'worker',
           'type': '<(library)',
           'dependencies': [
             '../base/base.gyp:base',
             '../webkit/webkit.gyp:webkit',
           ],
           'sources': [
             'tools/build/win/precompiled.cc',
             'tools/build/win/precompiled.h',
@@ skipping 40 matching lines @@
                           '../tools/code_coverage/coverage_posix.py',
                           '--directory',
                           '<(PRODUCT_DIR)' ],
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }