Update from https://crrev.com/307330

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.cc

 // Copyright (c) 2012 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "gpu/command_buffer/service/gl_utils.h"
@@ skipping 242 matching lines @@
 namespace gpu {
 
 CopyTextureCHROMIUMResourceManager::CopyTextureCHROMIUMResourceManager()
     : initialized_(false),
       vertex_shaders_(NUM_VERTEX_SHADERS, 0u),
       fragment_shaders_(NUM_FRAGMENT_SHADERS, 0u),
       buffer_id_(0u),
       framebuffer_(0u) {}
 
 CopyTextureCHROMIUMResourceManager::~CopyTextureCHROMIUMResourceManager() {
-  DCHECK(!buffer_id_);
-  DCHECK(!framebuffer_);
+  // |buffer_id_| and |framebuffer_| can be not-null because when GPU context is
+  // lost, this class can be deleted without releasing resources like
+  // GLES2DecoderImpl.
 }
 
 void CopyTextureCHROMIUMResourceManager::Initialize(
     const gles2::GLES2Decoder* decoder) {
   COMPILE_ASSERT(
       kVertexPositionAttrib == 0u,
       Position_attribs_must_be_0);
   DCHECK(!buffer_id_);
   DCHECK(!framebuffer_);
   DCHECK(programs_.empty());
@@ skipping 48 matching lines @@
     GLsizei height,
     bool flip_y,
     bool premultiply_alpha,
     bool unpremultiply_alpha) {
   bool premultiply_alpha_change = premultiply_alpha ^ unpremultiply_alpha;
   // GL_INVALID_OPERATION is generated if the currently bound framebuffer's
   // format does not contain a superset of the components required by the base
   // format of internalformat.
   // https://www.khronos.org/opengles/sdk/docs/man/xhtml/glCopyTexImage2D.xml
   bool source_format_contain_superset_of_dest_format =
-      source_internal_format == dest_internal_format ||
+      (source_internal_format == dest_internal_format &&
+       source_internal_format != GL_BGRA_EXT) ||
       (source_internal_format == GL_RGBA && dest_internal_format == GL_RGB);
   // GL_TEXTURE_RECTANGLE_ARB on FBO is supported by OpenGL, not GLES2,
   // so restrict this to GL_TEXTURE_2D.
   if (source_target == GL_TEXTURE_2D && !flip_y && !premultiply_alpha_change &&
       source_format_contain_superset_of_dest_format) {
     DoCopyTexImage2D(decoder,
                      source_target,
                      source_id,
                      dest_id,
                      dest_level,
@@ skipping 129 matching lines @@
   decoder->RestoreTextureState(dest_id);
   decoder->RestoreTextureUnitBindings(0);
   decoder->RestoreActiveTexture();
   decoder->RestoreProgramBindings();
   decoder->RestoreBufferBindings();
   decoder->RestoreFramebufferBindings();
   decoder->RestoreGlobalState();
 }
 
 }  // namespace gpu