Change the viewport size to the windows size.
commite91aa9ea67f61df6a0ccd9ddac36330dcd8a2770
authorowenlin@chromium.org <owenlin@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Wed, 13 Mar 2013 11:09:54 +0000 (13 11:09 +0000)
committerowenlin@chromium.org <owenlin@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Wed, 13 Mar 2013 11:09:54 +0000 (13 11:09 +0000)
treefe2f31f8adfda9147344b0643e656e274b7a420e
parentd19a7ee4660baa79ed3e4faf1628b319066778c7
Change the viewport size to the windows size.

Since we have different sizes of windows, we need to reset the
viewport and scissor when we switch between windows.

Also make sure MakeCurrent() executed before drawing content.
Otherwise, the content would be drawn to a wrong window.

BUG=chrome-os-partner:17620

Review URL: https://chromiumcodereview.appspot.com/12393024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@187825 0039d316-1c4b-4281-b951-d872f2087c98
content/common/gpu/media/rendering_helper_gl.cc