Fix texture copy issue in video painting on Canvas for Chrome on Android.

Need to set type as GraphicsContext3D::UNSIGNED_BYTE since the API is changed.

BUG=147265
TEST=webgl/conformance/textures/tex-image-and-sub-image-2d-with-video.html or http://html5doctor.com/demos/video-canvas-magic/demo1.html

Review URL: https://chromiumcodereview.appspot.com/14676015

git-svn-id: svn://svn.chromium.org/blink/trunk@150496 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed