cc: Add layer eviction iterator perftests.
cc: Add layer eviction iterator perftests.

This patch adds a construct and a construct and iterate tests for
layer level eviction iterators.

Initial runs:
[ RUN      ] PictureLayerImplPerfTest.LayerEvictionTileIteratorConstructAndIterate
*RESULT layer_eviction_tile_iterator_construct_and_iterate: 32_100x100= 47900.80859375 runs/s
*RESULT layer_eviction_tile_iterator_construct_and_iterate: 32_500x500= 50885.39453125 runs/s
*RESULT layer_eviction_tile_iterator_construct_and_iterate: 64_100x100= 49707.58984375 runs/s
*RESULT layer_eviction_tile_iterator_construct_and_iterate: 64_500x500= 49089.5078125 runs/s
[       OK ] PictureLayerImplPerfTest.LayerEvictionTileIteratorConstructAndIterate (8069 ms)
[ RUN      ] PictureLayerImplPerfTest.LayerEvictionTileIteratorConstruct
*RESULT layer_eviction_tile_iterator_construct: 0_0_100x100= 52248.0390625 runs/s
*RESULT layer_eviction_tile_iterator_construct: 5000_0_100x100= 28544.1015625 runs/s
*RESULT layer_eviction_tile_iterator_construct: 9999_0_100x100= 29921.828125 runs/s
[       OK ] PictureLayerImplPerfTest.LayerEvictionTileIteratorConstruct (6042 ms)


R=reveman

Review URL: https://codereview.chromium.org/404583002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@283979 0039d316-1c4b-4281-b951-d872f2087c98

fujunwei/chromium-crosswalk,krieger-od/nwjs_chromium.src,jaruba/chromium.src,Fireblend/chromium-crosswalk,jaruba/chromium.src,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk,dushu1203/chromium.src,chuan9/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,chuan9/chromium-crosswalk,M4sse/chromium.src,bright-sparks/chromium-spacewalk,ltilve/chromium,krieger-od/nwjs_chromium.src,ltilve/chromium,mohamed--abdel-maksoud/chromium.src,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,Chilledheart/chromium,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,crosswalk-project/chromium-crosswalk-efl,jaruba/chromium.src,axinging/chromium-crosswalk,M4sse/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,dushu1203/chromium.src,ondra-novak/chromium.src,Fireblend/chromium-crosswalk,Jonekee/chromium.src,jaruba/chromium.src,littlstar/chromium.src,chuan9/chromium-crosswalk,ondra-novak/chromium.src,ltilve/chromium,hgl888/chromium-crosswalk-efl,Chilledheart/chromium,Chilledheart/chromium,chuan9/chromium-crosswalk,Just-D/chromium-1,axinging/chromium-crosswalk,Chilledheart/chromium,dednal/chromium.src,dednal/chromium.src,dushu1203/chromium.src,dednal/chromium.src,markYoungH/chromium.src,Jonekee/chromium.src,dednal/chromium.src,littlstar/chromium.src,hgl888/chromium-crosswalk-efl,ltilve/chromium,M4sse/chromium.src,Jonekee/chromium.src,ondra-novak/chromium.src,TheTypoMaster/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,axinging/chromium-crosswalk,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,dushu1203/chromium.src,fujunwei/chromium-crosswalk,littlstar/chromium.src,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,Chilledheart/chromium,Fireblend/chromium-crosswalk,dushu1203/chromium.src,Pluto-tv/chromium-crosswalk,krieger-od/nwjs_chromium.src,littlstar/chromium.src,axinging/chromium-crosswalk,Pluto-tv/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,ltilve/chromium,fujunwei/chromium-crosswalk,Chilledheart/chromium,Jonekee/chromium.src,hgl888/chromium-crosswalk-efl,hgl888/chromium-crosswalk-efl,dushu1203/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,Just-D/chromium-1,Fireblend/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Fireblend/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,Jonekee/chromium.src,Fireblend/chromium-crosswalk,ltilve/chromium,Fireblend/chromium-crosswalk,ondra-novak/chromium.src,Chilledheart/chromium,axinging/chromium-crosswalk,hgl888/chromium-crosswalk-efl,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,Just-D/chromium-1,dushu1203/chromium.src,TheTypoMaster/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,M4sse/chromium.src,dushu1203/chromium.src,crosswalk-project/chromium-crosswalk-efl,ondra-novak/chromium.src,dednal/chromium.src,bright-sparks/chromium-spacewalk,hgl888/chromium-crosswalk-efl,dushu1203/chromium.src,fujunwei/chromium-crosswalk,Jonekee/chromium.src,Fireblend/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,crosswalk-project/chromium-crosswalk-efl,Just-D/chromium-1,markYoungH/chromium.src,bright-sparks/chromium-spacewalk,PeterWangIntel/chromium-crosswalk,M4sse/chromium.src,ondra-novak/chromium.src,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk-efl,PeterWangIntel/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,markYoungH/chromium.src,markYoungH/chromium.src,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,Chilledheart/chromium,fujunwei/chromium-crosswalk,ltilve/chromium,bright-sparks/chromium-spacewalk,hgl888/chromium-crosswalk,M4sse/chromium.src,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,M4sse/chromium.src,axinging/chromium-crosswalk,bright-sparks/chromium-spacewalk,Just-D/chromium-1,jaruba/chromium.src,hgl888/chromium-crosswalk-efl,TheTypoMaster/chromium-crosswalk,dednal/chromium.src,M4sse/chromium.src,fujunwei/chromium-crosswalk,bright-sparks/chromium-spacewalk,Pluto-tv/chromium-crosswalk,chuan9/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,TheTypoMaster/chromium-crosswalk,littlstar/chromium.src,hgl888/chromium-crosswalk-efl,chuan9/chromium-crosswalk,fujunwei/chromium-crosswalk,Chilledheart/chromium,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,ondra-novak/chromium.src,mohamed--abdel-maksoud/chromium.src,fujunwei/chromium-crosswalk,markYoungH/chromium.src,axinging/chromium-crosswalk,Just-D/chromium-1,jaruba/chromium.src,markYoungH/chromium.src,mohamed--abdel-maksoud/chromium.src,hgl888/chromium-crosswalk,M4sse/chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,ltilve/chromium,krieger-od/nwjs_chromium.src,Just-D/chromium-1,jaruba/chromium.src,krieger-od/nwjs_chromium.src,dednal/chromium.src,bright-sparks/chromium-spacewalk,crosswalk-project/chromium-crosswalk-efl,jaruba/chromium.src,littlstar/chromium.src,ondra-novak/chromium.src,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,bright-sparks/chromium-spacewalk,ondra-novak/chromium.src,dednal/chromium.src,krieger-od/nwjs_chromium.src,crosswalk-project/chromium-crosswalk-efl,Just-D/chromium-1,markYoungH/chromium.src,axinging/chromium-crosswalk,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,bright-sparks/chromium-spacewalk,PeterWangIntel/chromium-crosswalk,fujunwei/chromium-crosswalk,Pluto-tv/chromium-crosswalk,chuan9/chromium-crosswalk,hgl888/chromium-crosswalk-efl,dushu1203/chromium.src,littlstar/chromium.src,TheTypoMaster/chromium-crosswalk,Jonekee/chromium.src,Jonekee/chromium.src,Fireblend/chromium-crosswalk,markYoungH/chromium.src,jaruba/chromium.src,ltilve/chromium,hgl888/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,chuan9/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,PeterWangIntel/chromium-crosswalk,littlstar/chromium.src,PeterWangIntel/chromium-crosswalk,Just-D/chromium-1