Fix clang warning in GMSampleView.h
Fix clang warning in GMSampleView.h

../../samplecode/GMSampleView.h:23:7: warning: field 'fGM' will be initialized after field 'fShowSize' [-Wreorder]

R=bsalomon@google.com

Review URL: https://codereview.appspot.com/6856063

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@6507 2bbb7eff-a529-9590-31e7-b0007b416f81

Cue/skia,Cue/skia,Cue/skia,Cue/skia