Revert of gpu: support GL_TEXTURE_CUBE_MAP destination target to Copy(Sub)TextureCHROMIUM. (patchset #10 id:200001 of https://codereview.chromium.org/1275773003/ )

Reason for revert:
Linux AMD GPU FYI bot has a broken gl_tests, likely because of this patch.

http://build.chromium.org/p/chromium.gpu.fyi/builders/Linux%20Release%20%28ATI%29/builds/41273

[ RUN      ] GLCopyTextureCHROMIUMTests/GLCopyTextureCHROMIUMTest.Basic/2
Received signal 11 SEGV_MAPERR 000000000045
#0 0x000000492795 base::debug::(anonymous namespace)::StackDumpSignalHandler()
#1 0x7ff52630acb0 <unknown>
#2 0x7ff5232a858c <unknown>
#3 0x7ff5230a247c <unknown>
#4 0x7ff5230a33ae <unknown>
#5 0x7ff5227e8585 <unknown>
#6 0x7ff5227e9b0a <unknown>
#7 0x7ff522bf75c3 <unknown>
#8 0x0000004f7ba4 gfx::GLApiBase::glCopyTexImage2DFn()
#9 0x000000596ac1 (anonymous namespace)::DoCopyTexImage2D()
#10 0x0000005968c4 gpu::CopyTextureCHROMIUMResourceManager::DoCopyTexture()

Original issue's description:
> gpu: support GL_TEXTURE_CUBE_MAP destination target to Copy(Sub)TextureCHROMIUM.
>
> It makes it possible to optimize WebGL.
>
> TEST=gl_tests GLCopyTextureCHROMIUMTests/GLCopyTextureCHROMIUMTest.*
> BUG=517548
>
> Committed: https://crrev.com/fa25f0e5786527e63c6ff9aeda77da3bd7456ee3
> Cr-Commit-Position: refs/heads/master@{#347354}

TBR=piman@chromium.org,sievers@chromium.org,kbr@chromium.org,zmo@chromium.org,dongseong.hwang@intel.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=517548,528374

Review URL: https://codereview.chromium.org/1304103005

Cr-Commit-Position: refs/heads/master@{#347465}

1 files changed, 3 insertions, 13 deletions

diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
index 8329a2d..101c0f6 100644
--- a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
@@ -84,19 +84,13 @@ New Procedures and Functions
     INVALID_OPERATION is generated if the internal format of <source_id> is not one of
     formats from the table above.
 
-    INVALID_VALUE is generated if <target> is not GL_TEXTURE_2D,
-    GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
-    GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
-    GL_TEXTURE_CUBE_MAP_POSITIVE_Z, or GL_TEXTURE_CUBE_MAP_NEGATIVE_Z.
+    INVALID_VALUE is generated if <target> is not GL_TEXTURE_2D.
 
     INVALID_VALUE is generated if <source_id> or <dest_id> are not valid texture
     objects.
 
     INVALID_VALUE is generated if textures corresponding to <dest_id> have not
-    been bound as GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP object.
-
-    INVALID_VALUE is generated if the bound target of textures corresponding to
-    <dest_id> doesn't match <target>.
+    been bound as GL_TEXTURE_2D object.
 
     INVALID_VALUE is generated if textures corresponding to <source_id> have not
     been bound as GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_ARB or
@@ -134,10 +128,7 @@ New Procedures and Functions
     INVALID_OPERATION is generated if source internal_format and destination
     internal_format are not one of the valid formats described above.
 
-    INVALID_VALUE is generated if <target> is not GL_TEXTURE_2D,
-    GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
-    GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
-    GL_TEXTURE_CUBE_MAP_POSITIVE_Z, or GL_TEXTURE_CUBE_MAP_NEGATIVE_Z.
+    INVALID_VALUE is generated if <target> is not GL_TEXTURE_2D.
 
     INVALID_OPERATION is generated if the destination texture has not been
     defined.
@@ -179,4 +170,3 @@ Revision History
     16/7/2014   Add GL_TEXTURE_RECTANGLE_ARB as valid source_id target
     19/6/2015   Add arguments unpack_flip_y, unpack_premultiply_alpha, and
                 unpack_unmultiply_alpha to both commands.
-    6/8/2015    support GL_TEXTURE_CUBE_MAP destination target.