Revert r2584 (new test fails in fixed pt builds)



git-svn-id: http://skia.googlecode.com/svn/trunk@2585 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index f2ab703..5269b34 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -251,9 +251,7 @@
         // the device is as large as the current rendertarget, so we explicitly
         // only readback the amount we expect (in size)
         // overwrite our previous allocation
-        bitmap->setConfig(SkBitmap::kARGB_8888_Config, size.fWidth,
-                                                       size.fHeight);
-        gc.readPixels(bitmap, 0, 0);
+        gc.readPixels(SkIRect::MakeSize(size), bitmap);
     }
     return true;
 }