gpu: Make CopyTexture work with GL_BGRA_EXT destination textures.

gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc

Index: gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc b/gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc
index e637f749ce9e71fa9d9ecf64695ac175d664d5a8..d03b121fe2199a65956171484bf86cc760aa444a 100644
--- a/gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc
+++ b/gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc
@@ -116,7 +116,7 @@ TEST_F(GLCopyTextureCHROMIUMTest, InternalFormatNotSupported) {
 
   // Check unsupported format reports error.
   GLint unsupported_dest_formats[] = {GL_ALPHA, GL_LUMINANCE,
-                                      GL_LUMINANCE_ALPHA, GL_BGRA_EXT};
+                                      GL_LUMINANCE_ALPHA};
   for (size_t dest_index = 0; dest_index < arraysize(unsupported_dest_formats);
        dest_index++) {
     glCopyTextureCHROMIUM(GL_TEXTURE_2D,