gtk test shell

base/gfx/native_widget_types.h

Index: base/gfx/native_widget_types.h
diff --git a/base/gfx/native_widget_types.h b/base/gfx/native_widget_types.h
index f9623dbdcd29b8a9ce93391e5f63b46b26d793c9..b711b27d18661cad72bef8e878c22d26260ecd5d 100644
--- a/base/gfx/native_widget_types.h
+++ b/base/gfx/native_widget_types.h
@@ -19,7 +19,9 @@ class NSView;
 class NSWindow;
 class NSTextField;
 #endif  // __OBJC__
-#endif  // MACOSX
+#elif defined(OS_LINUX)
+typedef struct _GtkWidget GtkWidget;
+#endif
 
 namespace gfx {
 
@@ -31,6 +33,10 @@ typedef HWND EditViewHandle;
 typedef NSView *ViewHandle;
 typedef NSWindow *WindowHandle;
 typedef NSTextField *EditViewHandle;
+#elif defined(OS_LINUX)
+typedef GtkWidget* ViewHandle;
+typedef GtkWidget* WindowHandle;
+typedef GtkWidget* EditViewHandle;
 #else  // null port.
 typedef void* ViewHandle;
 typedef void* WindowHandle;