Rename aura_shell_unittests to ash_unittests, part 1

build/all.gyp

Index: build/all.gyp
diff --git a/build/all.gyp b/build/all.gyp
index 6e292a306e24b9061dbaa991aac1440576712882..c428d96e4367fc1a9c78c71adec4d34fc7313bbd 100644
--- a/build/all.gyp
+++ b/build/all.gyp
@@ -647,6 +647,11 @@
             ['use_ash==1', {
               'dependencies': [
                 '../ash/ash.gyp:ash_shell',
+                # With aura_shell_unittests as a target ash_unittests (the new
+                # name) will be built as well.  We need both until all build
+                # bots are running ash_unittests as the test target.
+                # TODO(jamescook): Switch to ash_unittests after all bots on
+                # waterfall are using the new name.  crbug.com/110107
                 '../ash/ash.gyp:aura_shell_unittests',
               ],
             }],