Revert of Refactor content/common/gpu into gpu/ipc/service

gpu/ipc/service/image_transport_surface_mac.mm

-// 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.
-
-#include "gpu/ipc/service/image_transport_surface.h"
-
-#include "base/macros.h"
-#include "gpu/ipc/service/pass_through_image_transport_surface.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gl/gl_surface_osmesa.h"
-
-namespace gpu {
-
-scoped_refptr<gfx::GLSurface> ImageTransportSurfaceCreateNativeSurface(
-    GpuChannelManager* manager,
-    GpuCommandBufferStub* stub,
-    SurfaceHandle handle);
-
-namespace {
-
-// A subclass of GLSurfaceOSMesa that doesn't print an error message when
-// SwapBuffers() is called.
-class DRTSurfaceOSMesa : public gfx::GLSurfaceOSMesa {
- public:
-  // Size doesn't matter, the surface is resized to the right size later.
-  DRTSurfaceOSMesa()
-      : GLSurfaceOSMesa(gfx::GLSurface::SURFACE_OSMESA_RGBA, gfx::Size(1, 1)) {}
-
-  // Implement a subset of GLSurface.
-  gfx::SwapResult SwapBuffers() override;
-
- private:
-  ~DRTSurfaceOSMesa() override {}
-  DISALLOW_COPY_AND_ASSIGN(DRTSurfaceOSMesa);
-};
-
-gfx::SwapResult DRTSurfaceOSMesa::SwapBuffers() {
-  return gfx::SwapResult::SWAP_ACK;
-}
-
-bool g_allow_os_mesa = false;
-
-}  //  namespace
-
-// static
-scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateNativeSurface(
-    GpuChannelManager* manager,
-    GpuCommandBufferStub* stub,
-    SurfaceHandle surface_handle,
-    gfx::GLSurface::Format format) {
-  DCHECK_NE(surface_handle, kNullSurfaceHandle);
-
-  switch (gfx::GetGLImplementation()) {
-    case gfx::kGLImplementationDesktopGL:
-    case gfx::kGLImplementationDesktopGLCoreProfile:
-    case gfx::kGLImplementationAppleGL:
-      return ImageTransportSurfaceCreateNativeSurface(manager, stub,
-                                                      surface_handle);
-    default:
-      // Content shell in DRT mode spins up a gpu process which needs an
-      // image transport surface, but that surface isn't used to read pixel
-      // baselines. So this is mostly a dummy surface.
-      if (!g_allow_os_mesa) {
-        NOTREACHED();
-        return nullptr;
-      }
-      scoped_refptr<gfx::GLSurface> surface(new DRTSurfaceOSMesa());
-      if (!surface.get() || !surface->Initialize(format))
-        return surface;
-      return scoped_refptr<gfx::GLSurface>(new PassThroughImageTransportSurface(
-          manager, stub, surface.get()));
-  }
-}
-
-// static
-void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
-  g_allow_os_mesa = allow;
-}
-
-}  // namespace gpu