Reland of 8525 with fix for case when GrRT outlives GrTexture.
Review URL: https://codereview.chromium.org/13814015

git-svn-id: http://skia.googlecode.com/svn/trunk@8573 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index d4e4e6b..f55c6ad 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -78,8 +78,7 @@
      *
      * If kRenderTarget_TextureFlag is specified the GrRenderTarget is
      * accessible via GrTexture::asRenderTarget(). The texture will hold a ref
-     * on the render target until its releaseRenderTarget() is called or it is
-     * destroyed.
+     * on the render target until the texture is destroyed.
      *
      * @param desc        describes the texture to be created.
      * @param srcData     texel data to load texture. Begins with full-size