Pull in the definition of PLATFORM_EXPORT too
Pull in the definition of PLATFORM_EXPORT too

brave/libchromiumcontent,adamjgray/libchromiumcontent,electron/libchromiumcontent,eric-seekas/libchromiumcontent,deepak1556/libchromiumcontent,bbondy/libchromiumcontent,atom/libchromiumcontent,jlord/libchromiumcontent,hokein/libchromiumcontent,synaptek/libchromiumcontent,paulcbetts/libchromiumcontent,hokein/libchromiumcontent,atom/libchromiumcontent,paulcbetts/libchromiumcontent,zhanggyb/libchromiumcontent,bbondy/libchromiumcontent,electron/libchromiumcontent,brave/libchromiumcontent,deepak1556/libchromiumcontent,synaptek/libchromiumcontent,eric-seekas/libchromiumcontent,jlord/libchromiumcontent,zhanggyb/libchromiumcontent,adamjgray/libchromiumcontent