Implemented window class on linux. Standalone demos are working on linux now.

gpu/demos/demos.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,
     'conditions': [
       # Pepper demos that are compiled as shared libraries need to be compiled
       # with -fPIC flag. All static libraries that these demos depend on must
@@ skipping 25 matching lines @@
     },
     {
       'target_name': 'gpu_demo_framework_exe',
       'type': 'static_library',
       'dependencies': [
         'gpu_demo_framework',
         '../gpu.gyp:command_buffer_client',
         '../gpu.gyp:command_buffer_service',
       ],
       'sources': [
+        'framework/main_exe.cc',
         'framework/window.cc',
         'framework/window.h',
       ],
       'conditions': [
-        ['OS=="linux"', {'sources': ['framework/window_linux.cc']}],
-        ['OS=="mac"', {'sources': ['framework/window_mac.mm']}],
-        ['OS=="win"', {'sources': ['framework/window_win.cc']}],
+        ['OS=="linux"', {
+          'sources': ['framework/window_linux.cc'],
+          'dependencies': ['../../build/linux/system.gyp:gtk'],
+        }],
+        ['OS=="mac"', {
+          'sources': ['framework/window_mac.mm'],
+        }],
+        ['OS=="win"', {
+          'sources': ['framework/window_win.cc'],
+        }],
       ],
-      'direct_dependent_settings': {
-        'sources': ['framework/main_exe.cc'],
-      },
     },
     {
       'target_name': 'gpu_demo_framework_pepper',
       'type': 'static_library',
       'dependencies': [
         'gpu_demo_framework',
         '../gpu.gyp:pgl',
       ],
       'sources': [
         'framework/plugin.cc',
@@ skipping 202 matching lines @@
       ],
     }],
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: