No bug - Remove unnecessary forward declaration from transport_dib.h.

ipc/chromium/src/chrome/common/transport_dib.h

@@ -17,10 +17,6 @@
 #include "chrome/common/x11_util.h"
 #endif
 
-namespace gfx {
-class Size;
-}
-
 // -----------------------------------------------------------------------------
 // A TransportDIB is a block of memory that is used to transport pixels
 // between processes: from the renderer process to the browser, and