Eliminate the 'build_ppapi_ipc_proxy_untrusted' build flag for untrusted PPAPI proxy builds.

build/all.gyp

Index: build/all.gyp
===================================================================
--- build/all.gyp	(revision 151607)
+++ build/all.gyp	(working copy)
@@ -156,14 +156,6 @@
             '../net/third_party/nss/ssl.gyp:*',
           ],
         }],
-        ['disable_nacl==0 and disable_nacl_untrusted==0', {
-          'dependencies': [
-            '../base/base_untrusted.gyp:*',
-            '../ipc/ipc_untrusted.gyp:*',
-            '../ppapi/ppapi_proxy_untrusted.gyp:*',
-            '../ppapi/ppapi_shared_untrusted.gyp:*',
-          ],
-        }],
       ],
     }, # target_name: All
     {
@@ -244,12 +236,6 @@
             '../sandbox/sandbox.gyp:sandbox_linux_unittests',
           ],
         }],
-        ['disable_nacl==0 and disable_nacl_untrusted==0', {
-          'dependencies': [
-            # TODO(bbudge): drop this when we have switched the NaCl proxy to IPC.
-            '../ppapi/ppapi_proxy_untrusted.gyp:ppapi_proxy_untrusted',
-          ],
-        }],
       ],
     }, # target_name: chromium_builder_tests
     {