Move content::MakeSharedMemorySegmentViaIPC into its own file

chrome/nacl.gypi

Index: chrome/nacl.gypi
diff --git a/chrome/nacl.gypi b/chrome/nacl.gypi
index 32d1d5aed1618327476c61eefbf90d5ed6cf46c0..dc200f5f75b8369686276d19570a1751dca4a10b 100644
--- a/chrome/nacl.gypi
+++ b/chrome/nacl.gypi
@@ -67,9 +67,7 @@
             'nacl_target': 1,
           },
           'dependencies': [
-            'chrome_resources.gyp:chrome_resources',
-            'chrome_resources.gyp:chrome_strings',
-            'common',
+            '../ipc/ipc.gyp:ipc',
             '../ppapi/native_client/native_client.gyp:nacl_irt',
             '../webkit/support/webkit_support.gyp:glue',
             '../ppapi/native_client/src/trusted/plugin/plugin.gyp:ppGoogleNaClPluginChrome',
@@ -139,6 +137,9 @@
               ],
               'sources': [
                 'nacl/nacl_helper_linux.cc',
+                '../chrome/common/nacl_messages.cc',
+                '../content/common/child_process_sandbox_support_impl_shm_linux.cc',
+                '../content/common/unix_domain_socket_posix.cc',
               ],
               'conditions': [
                 ['toolkit_uses_gtk == 1', {