Initial GYP file for skia / gr. Builds SampleApp on Mac, Windows, Linux.

Review URL: http://codereview.appspot.com/4282056/

git-svn-id: http://skia.googlecode.com/svn/trunk@955 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/unix/SkOSWindow_Unix.cpp b/src/utils/unix/SkOSWindow_Unix.cpp
index 75e8209..96940f5 100644
--- a/src/utils/unix/SkOSWindow_Unix.cpp
+++ b/src/utils/unix/SkOSWindow_Unix.cpp
@@ -26,7 +26,7 @@
     fUnixWindow.fGc = gc;
 }
 
-bool SkOSWindow::attachGL(const SkBitmap* offscreen)
+bool SkOSWindow::attachGL()
 {
     return false;
 }