Add GN assert to prevent GOMA from being used with static analyzer.

build/toolchain/mac/BUILD.gn

 # Copyright (c) 2013 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.
 
 # TODO(brettw) Use "gcc_toolchain.gni" like the Linux toolchains. This requires
 # some enhancements since the commands on Mac are slightly different than on
 # Linux.
 
 import("../goma.gni")
 import("//build/config/clang/clang.gni")
@@ skipping 106 matching lines @@
       compiler_prefix = "$goma_dir/gomacc "
     } else if (toolchain_cc_wrapper != "") {
       compiler_prefix = toolchain_cc_wrapper + " "
     } else {
       compiler_prefix = ""
     }
 
     cc = compiler_prefix + _cc
     cxx = compiler_prefix + _cxx
 
-    if (use_clang_static_analyzer && !toolchain_uses_goma) {
+    if (use_clang_static_analyzer) {
+      # Static analysis isn't supported under GOMA. See crbug.com/687245
+      # for progress on this issue.
+      assert(!use_goma, "'use_clang_static_analyzer' cannot be used with GOMA.")
+
       # Call "ccc-analyzer" or "c++-analyzer" instead of directly calling Clang.
       # |wrapper_tool| sets the environment variables which are read by the
       # analyzer tools.
       analyzer_wrapper =
           rebase_path("//build/toolchain/clang_static_analyzer_wrapper.py",
                       root_build_dir)
       cc = analyzer_wrapper + " --clang-cc-path=${cc} --analyzer=" +
            rebase_path("//third_party/scan-build/src/libexec/ccc-analyzer",
                        root_build_dir)
       cxx = analyzer_wrapper + " --clang-cxx-path=${cxx} --analyzer=" +
@@ skipping 378 matching lines @@
     }
   }
 
   mac_toolchain("ios_clang_x64") {
     toolchain_args = {
       current_cpu = "x64"
       current_os = "ios"
     }
   }
 }