Copy cdb.exe to build_root_dir so it's available to isolated tests

build/toolchain/win/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.
 
 import("//build/config/clang/clang.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/win/visual_studio_version.gni")
 import("//build/toolchain/goma.gni")
 import("//build/toolchain/toolchain.gni")
@@ skipping 26 matching lines @@
   }
   exec_script("../../vs_toolchain.py",
               [
                 "copy_dlls",
                 rebase_path(root_build_dir),
                 configuration_name,
                 target_cpu,
               ])
 }
 
+# Copy cdb.exe for the default toolchain to the root build directory for
+# isolated tests that need to symbolize minidumps.
+if (current_toolchain == default_toolchain) {
+  exec_script("../../vs_toolchain.py",
+              [
+                "copy_debugger",
+                rebase_path(root_build_dir),
+                target_cpu,
+              ])
+}

[Dirk Pranke, 2017/02/10 18:06:18]

Can we merge this into the prior exec_script() call to make things faster?

+
 # Parameters:
 #   environment: File name of environment file.
 #
 # You would also define a toolchain_args variable with at least these set:
 #   current_cpu: current_cpu to pass as a build arg
 #   current_os: current_os to pass as a build arg
 template("msvc_toolchain") {
   toolchain(target_name) {
     # When invoking this toolchain not as the default one, these args will be
     # passed to the build. They are ignored when this is the default toolchain.
@@ skipping 382 matching lines @@
   msvc_toolchain("winrt_x64") {
     environment = "environment.winrt_x64"
     cl = "${goma_prefix}\"${vc_bin_dir}/cl.exe\""
 
     toolchain_args = {
       is_clang = false
       current_cpu = "x64"
     }
   }
 }