gpu: support immutable texture on Linux Mesa driver and GLES3.

cc/test/test_web_graphics_context_3d.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
 #define CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 286 matching lines @@
   }
   void set_have_post_sub_buffer(bool have) {
     test_capabilities_.gpu.post_sub_buffer = have;
   }
   void set_have_discard_framebuffer(bool have) {
     test_capabilities_.gpu.discard_framebuffer = have;
   }
   void set_support_compressed_texture_etc1(bool support) {
     test_capabilities_.gpu.texture_format_etc1 = support;
   }
+  void set_support_texture_format_bgra8888(bool support) {
+    test_capabilities_.gpu.texture_format_bgra8888 = support;
+  }
   void set_support_texture_storage(bool support) {
     test_capabilities_.gpu.texture_storage = support;
   }
   void set_support_texture_usage(bool support) {
     test_capabilities_.gpu.texture_usage = support;
   }
   void set_support_sync_query(bool support) {
     test_capabilities_.gpu.sync_query = support;
   }
 
@@ skipping 133 matching lines @@
 
   scoped_refptr<Namespace> namespace_;
   static Namespace* shared_namespace_;
 
   base::WeakPtrFactory<TestWebGraphicsContext3D> weak_ptr_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_WEB_GRAPHICS_CONTEXT_3D_H_