Fix blits from multisampled renderbuffers to alpha:false WebGL back buffer.

gpu/command_buffer/client/gles2_interface_autogen.h

 // Copyright 2014 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 714 matching lines @@
 virtual void ProduceTextureDirectCHROMIUM(GLuint texture,
                                           GLenum target,
                                           const GLbyte* mailbox) = 0;
 virtual void ConsumeTextureCHROMIUM(GLenum target, const GLbyte* mailbox) = 0;
 virtual GLuint CreateAndConsumeTextureCHROMIUM(GLenum target,
                                                const GLbyte* mailbox) = 0;
 virtual void BindUniformLocationCHROMIUM(GLuint program,
                                          GLint location,
                                          const char* name) = 0;
 virtual void BindTexImage2DCHROMIUM(GLenum target, GLint imageId) = 0;
+virtual void BindTexImage2DWithInternalformatCHROMIUM(GLenum target,
+                                                      GLenum internalformat,
+                                                      GLint imageId) = 0;
 virtual void ReleaseTexImage2DCHROMIUM(GLenum target, GLint imageId) = 0;
 virtual void TraceBeginCHROMIUM(const char* category_name,
                                 const char* trace_name) = 0;
 virtual void TraceEndCHROMIUM() = 0;
 virtual void DiscardFramebufferEXT(GLenum target,
                                    GLsizei count,
                                    const GLenum* attachments) = 0;
 virtual void LoseContextCHROMIUM(GLenum current, GLenum other) = 0;
 virtual GLuint64 InsertFenceSyncCHROMIUM() = 0;
 virtual void GenSyncTokenCHROMIUM(GLuint64 fence_sync, GLbyte* sync_token) = 0;
@@ skipping 159 matching lines @@
                                           GLint display_x,
                                           GLint display_y) = 0;
 virtual void SwapBuffersWithBoundsCHROMIUM(GLsizei count,
                                            const GLint* rects) = 0;
 virtual void SetDrawRectangleCHROMIUM(GLint x,
                                       GLint y,
                                       GLint width,
                                       GLint height) = 0;
 virtual void SetEnableDCLayersCHROMIUM(GLboolean enabled) = 0;
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_INTERFACE_AUTOGEN_H_