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

build/toolchain/gcc_toolchain.gni

 # 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/clang/clang.gni")
 import("//build/config/nacl/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/v8_target_cpu.gni")
 import("//build/toolchain/cc_wrapper.gni")
@@ skipping 471 matching lines @@
     toolprefix = ""
   }
 
   gcc_toolchain(target_name) {
     prefix = rebase_path("$clang_base_path/bin", root_build_dir)
     cc = "$prefix/clang"
     cxx = "$prefix/clang++"
     ld = cxx
 
     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=" +
             rebase_path("//third_party/scan-build/src/libexec/c++-analyzer",
                         root_build_dir)
     }
 
     readelf = "${toolprefix}readelf"
     ar = "${toolprefix}ar"
     nm = "${toolprefix}nm"
 
     forward_variables_from(invoker, [ "strip" ])
 
     toolchain_args = {
       if (defined(invoker.toolchain_args)) {
         forward_variables_from(invoker.toolchain_args, "*")
       }
       is_clang = true
     }
   }
 }