Add gpu targets to untrusted NaCl build.

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 255 matching lines @@
       'enable_web_intents_tag%': 0,
 
       # Webrtc compilation is enabled by default. Set to 0 to disable.
       'enable_webrtc%': 1,
 
       # PPAPI by default does not support plugins making calls off the main
       # thread. Set to 1 to turn on experimental support for out-of-process
       # plugins to make call of the main thread.
       'enable_pepper_threading%': 0,
 
-      # Include the PPAPI IPC proxy for NaCl. This is a work-in-progress; this

[brettw, 2012/07/23 19:42:51]

It's not clear to me why you deleted this.

[bbudge, 2012/07/23 19:53:40]

To get gpu code to build, we need a compile time flag 'NACL_IPC_PPAPI_PROXY', to
avoid pulling in NaCl's custom ref_counted (used to avoid dependency on base in
the SRPC proxy). I couldn't successfully define such a flag using this variable
as defined here so I moved it to untrusted.gypi in the NaCl repo. This should be
OK since we shouldn't need to alter the trusted build. In fact, we may want to
remove this entirely and build both proxies side by side, using the Chrome flag
alone to determine which proxy starts up.

-      # allows us to build this feature locally without it affecting others
-      # working in affected subsystems like base and ipc.
-      'build_ppapi_ipc_proxy_untrusted%': 0,
-
       # Enables use of the session service, which is enabled by default.
       # Support for disabling depends on the platform.
       'enable_session_service%': 1,
 
       # Enables theme support, which is enabled by default.  Support for
       # disabling depends on the platform.
       'enable_themes%': 1,
 
       # Enables support for background apps.
       'enable_background%': 1,
@@ skipping 3018 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }