Fleshes out WidgetGTK and WindowGTK a bit more. This is still vary
rough, but makes things work a bit more.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/113123

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15598 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/build_config.h b/build/build_config.h
index 824e31ef..43d36f0 100644
--- a/build/build_config.h
+++ b/build/build_config.h
@@ -19,6 +19,10 @@
 #define OS_MACOSX 1
 #elif defined(__linux__)
 #define OS_LINUX 1
+// Use TOOLKIT_GTK on linux if TOOLKIT_VIEWS isn't defined.
+#if !defined(TOOLKIT_VIEWS)
+#define TOOLKIT_GTK
+#endif
 #elif defined(_WIN32)
 #define OS_WIN 1
 #else