Attempt to fix ChromeFrameTestWithWebServer tests.

chrome/browser/ui/window_snapshot/window_snapshot.h

Index: chrome/browser/ui/window_snapshot/window_snapshot.h
diff --git a/chrome/browser/ui/window_snapshot/window_snapshot.h b/chrome/browser/ui/window_snapshot/window_snapshot.h
index 86884af1f9eb99bc5cf49383992887e82a059fe1..a019061dba0a18018e514bd5acc302f66623cb50 100644
--- a/chrome/browser/ui/window_snapshot/window_snapshot.h
+++ b/chrome/browser/ui/window_snapshot/window_snapshot.h
@@ -18,7 +18,8 @@ namespace browser {
 
 // Grabs a snapshot of the rectangle area |snapshot_bounds| with respect to the
 // top left corner of the designated window and stores a PNG representation
-// into a byte vector. Returns true if the operation is successful.
+// into a byte vector. On Windows, |window| may be NULL to grab a snapshot of
+// the primary monitor. Returns true if the operation is successful.
 bool GrabWindowSnapshot(gfx::NativeWindow window,
                         std::vector<unsigned char>* png_representation,
                         const gfx::Rect& snapshot_bounds);