Backport to R19 of r132638 r133017 r133579 r133732

Backport to R19 of r132638 r133017 r133579 r133732

texture_image_transport: have a current context when we're releasing textures

In some cases, the TextureImageTransportSurface may get destroyed when no
context is current. When that's the case, glDeleteTextures becomes a noop and we
leak them.

BUG=123933
TEST=manual

Review URL: http://codereview.chromium.org/10200012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133732 0039d316-1c4b-4281-b951-d872f2087c98

Unbind texture from all texture units when deleting it.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/10179006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133579 0039d316-1c4b-4281-b951-d872f2087c98

aura: Add flush() to make sure delete operations make it through when we intend.

Resource deletion doesn't force a flush, so for textures that are deleted on a
little-used shared context, the delete command may sit in the command buffer for
arbitrary long.

This fixes it.

BUG=123933
TEST=chrome/aura, open many tabs, close all of them, check that GPU memory is reclaimed.

Review URL: http://codereview.chromium.org/10078002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133017 0039d316-1c4b-4281-b951-d872f2087c98

Conflicts:

	content/common/gpu/client/gl_helper.cc

aura/texture transport: Keep ref to texture infos to avoid races with the UI

In some cases, the UI may destroy the textures the renderer is rendering into
before the renderer has a chance to finish.
This patch makes it so that we avoid generating a lost context event in the
page that is closing, because we can't recover correctly in the other pages in
the same renderer process.

This also adds logging so that we can audit all cases of lost context.

BUG=122868
TEST=run aura chrome, open and close tabs (from the same process), observe no
flashing and no mention of a lost context.

Review URL: http://codereview.chromium.org/10103021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132638 0039d316-1c4b-4281-b951-d872f2087c98

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=134340