Reland of 8525 with fix for case when GrRT outlives GrTexture.

Reland of 8525 with fix for case when GrRT outlives GrTexture.
Committed: https://code.google.com/p/skia/source/detail?r=8573

[bsalomon, 2013-04-09 13:38:26]

Take 2 at the isSameAs() change. The two new diff blocks are noted.

https://codereview.chromium.org/13814015/diff/1/include/gpu/GrRenderTarget.h
File include/gpu/GrRenderTarget.h (left):

https://codereview.chromium.org/13814015/diff/1/include/gpu/GrRenderTarget.h#...
include/gpu/GrRenderTarget.h:155: // classes. By the time of texture base
destructor it has already
This comment no longer applies.

https://codereview.chromium.org/13814015/diff/1/include/gpu/GrRenderTarget.h
File include/gpu/GrRenderTarget.h (right):

https://codereview.chromium.org/13814015/diff/1/include/gpu/GrRenderTarget.h#...
include/gpu/GrRenderTarget.h:156: friend class GrTexture;
This block was added to the original change.

https://codereview.chromium.org/13814015/diff/1/src/gpu/GrTexture.cpp
File src/gpu/GrTexture.cpp (right):

https://codereview.chromium.org/13814015/diff/1/src/gpu/GrTexture.cpp#newcode20
src/gpu/GrTexture.cpp:20: GrTexture::~GrTexture() {
This was added to the original change.

[robertphillips, 2013-04-09 13:45:12]

lgtm

[bsalomon, 2013-04-09 15:04:20]

Committed patchset #1 manually as r8573 (presubmit successful).