Do not handle mouse wheel events when Ctrl is pressed
Do not handle mouse wheel events when Ctrl is pressed

This commit does not change existing behavior.

Previously, the renderer would not see Ctrl+scrollwheel at all, because
these were intercepted early and not passed to the renderer.
However, this has changed in https://codereview.chromium.org/165143003/,
to allow web pages to catch and handle the event.

To allow the browser to handle Ctrl+scrollwheel (zooming),
handleWheelEvent now ignores the event when Ctrl is pressed.

Contributed by Rob Wu <rob@robwu.nl>

BUG=111059

Review URL: https://codereview.chromium.org/168493002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@167355 bbb929c8-8fbe-4397-9dbb-9b2b20218538

XiaosongWei/blink-crosswalk,kurli/blink-crosswalk,kurli/blink-crosswalk,PeterWangIntel/blink-crosswalk,ondra-novak/blink,Bysmyyr/blink-crosswalk,modulexcite/blink,kurli/blink-crosswalk,kurli/blink-crosswalk,modulexcite/blink,nwjs/blink,XiaosongWei/blink-crosswalk,jtg-gg/blink,nwjs/blink,hgl888/blink-crosswalk-efl,jtg-gg/blink,Bysmyyr/blink-crosswalk,smishenk/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,Bysmyyr/blink-crosswalk,PeterWangIntel/blink-crosswalk,Pluto-tv/blink-crosswalk,nwjs/blink,smishenk/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,Pluto-tv/blink-crosswalk,hgl888/blink-crosswalk-efl,smishenk/blink-crosswalk,PeterWangIntel/blink-crosswalk,smishenk/blink-crosswalk,hgl888/blink-crosswalk-efl,crosswalk-project/blink-crosswalk-efl,smishenk/blink-crosswalk,Pluto-tv/blink-crosswalk,hgl888/blink-crosswalk-efl,PeterWangIntel/blink-crosswalk,modulexcite/blink,Bysmyyr/blink-crosswalk,PeterWangIntel/blink-crosswalk,XiaosongWei/blink-crosswalk,nwjs/blink,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,PeterWangIntel/blink-crosswalk,XiaosongWei/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,PeterWangIntel/blink-crosswalk,hgl888/blink-crosswalk-efl,crosswalk-project/blink-crosswalk-efl,XiaosongWei/blink-crosswalk,nwjs/blink,jtg-gg/blink,ondra-novak/blink,smishenk/blink-crosswalk,modulexcite/blink,Pluto-tv/blink-crosswalk,ondra-novak/blink,hgl888/blink-crosswalk-efl,smishenk/blink-crosswalk,jtg-gg/blink,nwjs/blink,Bysmyyr/blink-crosswalk,XiaosongWei/blink-crosswalk,ondra-novak/blink,PeterWangIntel/blink-crosswalk,kurli/blink-crosswalk,ondra-novak/blink,XiaosongWei/blink-crosswalk,ondra-novak/blink,PeterWangIntel/blink-crosswalk,ondra-novak/blink,hgl888/blink-crosswalk-efl,crosswalk-project/blink-crosswalk-efl,ondra-novak/blink,kurli/blink-crosswalk,XiaosongWei/blink-crosswalk,modulexcite/blink,modulexcite/blink,crosswalk-project/blink-crosswalk-efl,modulexcite/blink,Bysmyyr/blink-crosswalk,PeterWangIntel/blink-crosswalk,nwjs/blink,XiaosongWei/blink-crosswalk,kurli/blink-crosswalk,jtg-gg/blink,Bysmyyr/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,kurli/blink-crosswalk,nwjs/blink,jtg-gg/blink,smishenk/blink-crosswalk,jtg-gg/blink,nwjs/blink,hgl888/blink-crosswalk-efl,Pluto-tv/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,Pluto-tv/blink-crosswalk,XiaosongWei/blink-crosswalk,nwjs/blink,ondra-novak/blink,Bysmyyr/blink-crosswalk,kurli/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,modulexcite/blink,Bysmyyr/blink-crosswalk,jtg-gg/blink,hgl888/blink-crosswalk-efl,smishenk/blink-crosswalk,smishenk/blink-crosswalk,Bysmyyr/blink-crosswalk,jtg-gg/blink,modulexcite/blink,kurli/blink-crosswalk,jtg-gg/blink,hgl888/blink-crosswalk-efl,modulexcite/blink