Reorganized dependencies in generated samples_gen.gyp so that the conversion step always occurs before the copying step, which fixes a build problem on Windows. Worked around a gyp issue on Windows to properly convert both the plugin and WebGL versions of a couple of the assets.
Reorganized dependencies in generated samples_gen.gyp so that the
conversion step always occurs before the copying step, which fixes a
build problem on Windows. Worked around a gyp issue on Windows to
properly convert both the plugin and WebGL versions of a couple of the
assets.

BUG=none
TEST=built on Windows
TBR=gman

Review URL: http://codereview.chromium.org/1801008

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@46002 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,ropik/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,ropik/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,adobe/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,yitian134/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium