gpu: glCopyTextureCHROMIUM() checks dest internal format incorrectly.

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt

Index: gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
index fdaa7d64b7b139fe757931769bf16d006460a579..63093b0b5e4e8ec3a81a23358fb368f55cda627b 100644
--- a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_copy_texture.txt
@@ -48,7 +48,10 @@ New Procedures and Functions
 
     The internal format of the destination texture is converted to that
     specified by <internal_format>. Must be one of the following symbolic
-    constants: GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA
+    constants: GL_RGB, GL_RGBA
+    The internal format of <source_id> texture must be one of the following
+    symbolic constants: GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB,
+    GL_RGBA, GL_BGRA_EXT
     When <source_id> texture doens't contain a superset of the component
     required by <internal_format>, fill the components by following rules.
 
@@ -59,6 +62,7 @@ New Procedures and Functions
                    GL_LUMINANCE_ALPHA     (L, L, L, A)
                    GL_RGB                 (R, G, B, 1)
                    GL_RGBA                (R, G, B, A)
+                   GL_BGRA_EXT            (R, G, B, A)
 
     The format type of the destination texture is converted to that specified
     by <dest_type>.