Refactor some more BrowserMain code. Move core code that's required by all embedders to content.

content/content_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'content_browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 552 matching lines @@
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
             '../build/linux/system.gyp:dbus',
             # For FcLangSetAdd call in render_sandbox_host_linux.cc
             '../build/linux/system.gyp:fontconfig',
             '../build/linux/system.gyp:gtk',
             # For XShm* in backing_store_x.cc
             '../build/linux/system.gyp:x11',
             '../dbus/dbus.gyp:dbus',
           ],
+          'conditions': [
+            ['linux_sandbox_path != ""', {
+              'defines': [
+                'LINUX_SANDBOX_PATH="<(linux_sandbox_path)"',
+              ],
+            }],
+          ],
         }],
         ['OS=="linux" and toolkit_views==1',{
           'dependencies': [
             '../views/views.gyp:views',
           ],
         }],
         ['OS=="mac"', {
           'sources!': [
             'browser/power_save_blocker_stub.cc',
           ],
@@ skipping 30 matching lines @@
             ['exclude', '^browser/accessibility/browser_accessibility_win.h'],
             ['exclude', '^browser/renderer_host/render_widget_host_view_win.cc'],
             ['exclude', '^browser/renderer_host/render_widget_host_view_win.h'],
             ['exclude', '^browser/renderer_host/render_message_filter_win.cc'],
           ],
         }],
       ],
     },
   ],
 }