Simplify MediaController with C++11 range-base for loops
Simplify MediaController with C++11 range-base for loops

Some uses of MediaElementSequence::const_iterator remain, where the
first media element in m_mediaElements is handled differently.

Review URL: https://codereview.chromium.org/612873002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@182845 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Bysmyyr/blink-crosswalk,XiaosongWei/blink-crosswalk,kurli/blink-crosswalk,Bysmyyr/blink-crosswalk,PeterWangIntel/blink-crosswalk,kurli/blink-crosswalk,smishenk/blink-crosswalk,kurli/blink-crosswalk,Bysmyyr/blink-crosswalk,modulexcite/blink,kurli/blink-crosswalk,nwjs/blink,modulexcite/blink,Pluto-tv/blink-crosswalk,modulexcite/blink,jtg-gg/blink,Pluto-tv/blink-crosswalk,smishenk/blink-crosswalk,PeterWangIntel/blink-crosswalk,kurli/blink-crosswalk,smishenk/blink-crosswalk,kurli/blink-crosswalk,Bysmyyr/blink-crosswalk,modulexcite/blink,Pluto-tv/blink-crosswalk,nwjs/blink,smishenk/blink-crosswalk,XiaosongWei/blink-crosswalk,smishenk/blink-crosswalk,smishenk/blink-crosswalk,modulexcite/blink,Bysmyyr/blink-crosswalk,jtg-gg/blink,PeterWangIntel/blink-crosswalk,jtg-gg/blink,PeterWangIntel/blink-crosswalk,jtg-gg/blink,nwjs/blink,XiaosongWei/blink-crosswalk,jtg-gg/blink,modulexcite/blink,Pluto-tv/blink-crosswalk,nwjs/blink,jtg-gg/blink,PeterWangIntel/blink-crosswalk,kurli/blink-crosswalk,Bysmyyr/blink-crosswalk,nwjs/blink,modulexcite/blink,smishenk/blink-crosswalk,smishenk/blink-crosswalk,PeterWangIntel/blink-crosswalk,XiaosongWei/blink-crosswalk,XiaosongWei/blink-crosswalk,kurli/blink-crosswalk,nwjs/blink,Pluto-tv/blink-crosswalk,nwjs/blink,smishenk/blink-crosswalk,jtg-gg/blink,modulexcite/blink,XiaosongWei/blink-crosswalk,Bysmyyr/blink-crosswalk,Pluto-tv/blink-crosswalk,PeterWangIntel/blink-crosswalk,XiaosongWei/blink-crosswalk,XiaosongWei/blink-crosswalk,jtg-gg/blink,nwjs/blink,PeterWangIntel/blink-crosswalk,smishenk/blink-crosswalk,modulexcite/blink,nwjs/blink,modulexcite/blink,jtg-gg/blink,PeterWangIntel/blink-crosswalk,kurli/blink-crosswalk,Pluto-tv/blink-crosswalk,Bysmyyr/blink-crosswalk,XiaosongWei/blink-crosswalk,Pluto-tv/blink-crosswalk,nwjs/blink,kurli/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Bysmyyr/blink-crosswalk,jtg-gg/blink,Bysmyyr/blink-crosswalk,XiaosongWei/blink-crosswalk,PeterWangIntel/blink-crosswalk