Fix use_aura=1 component build.

TBR=ben@chromium.org
BUG=None
TEST=builds with GYP_DEFINES="component=shared_library use_aura=1" on linux

Review URL: http://codereview.chromium.org/8551008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110917 0039d316-1c4b-4281-b951-d872f2087c98

chrome/chrome_browser.gypi

@@ -4253,6 +4253,7 @@
             ['include', '^browser/ui/webui/cookies_tree_model_adapter.h'],
           ],
           'dependencies': [
+            '../ui/aura/aura.gyp:aura',
             '../ui/aura_shell/aura_shell.gyp:aura_shell',
             '../ui/gfx/compositor/compositor.gyp:compositor',
           ],