Amend PATH for nacl64 so loader can find x64 CRT

build/gyp_chromium

Index: build/gyp_chromium
diff --git a/build/gyp_chromium b/build/gyp_chromium
index a158f3995a36c0ac4b59b96937e49ae12d061f9f..7274963aca534e0bf71c26fe8b24cfbc36609e73 100755
--- a/build/gyp_chromium
+++ b/build/gyp_chromium
@@ -369,13 +369,22 @@ def CopyVsRuntimeDlls(output_dir, runtime_dirs):
 
   x86, x64 = runtime_dirs
   out_debug = os.path.join(output_dir, 'Debug')
+  out_debug_nacl64 = os.path.join(output_dir, 'Debug', 'x64')
   out_release = os.path.join(output_dir, 'Release')
+  out_release_nacl64 = os.path.join(output_dir, 'Release', 'x64')
   out_debug_x64 = os.path.join(output_dir, 'Debug_x64')
   out_release_x64 = os.path.join(output_dir, 'Release_x64')
-  copy_runtime(out_debug,       x86, 'msvc%s120d.dll')
-  copy_runtime(out_release,     x86, 'msvc%s120.dll')
-  copy_runtime(out_debug_x64,   x64, 'msvc%s120d.dll')
-  copy_runtime(out_release_x64, x64, 'msvc%s120.dll')
+
+  if os.path.exists(out_debug) and not os.path.exists(out_debug_nacl64):
+    os.makedirs(out_debug_nacl64)
+  if os.path.exists(out_release) and not os.path.exists(out_release_nacl64):
+    os.makedirs(out_release_nacl64)
+  copy_runtime(out_debug,          x86, 'msvc%s120d.dll')
+  copy_runtime(out_release,        x86, 'msvc%s120.dll')
+  copy_runtime(out_debug_x64,      x64, 'msvc%s120d.dll')
+  copy_runtime(out_release_x64,    x64, 'msvc%s120.dll')
+  copy_runtime(out_debug_nacl64,   x64, 'msvc%s120d.dll')
+  copy_runtime(out_release_nacl64, x64, 'msvc%s120.dll')
 
 
 if __name__ == '__main__':