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

content/common/gpu/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 "content/common/gpu/image_transport_surface.h"
+
+#include "base/macros.h"
+#include "content/common/gpu/pass_through_image_transport_surface.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gl/gl_surface_osmesa.h"
+
+namespace content {
+
+scoped_refptr<gfx::GLSurface> ImageTransportSurfaceCreateNativeSurface(
+    GpuChannelManager* manager,
+    GpuCommandBufferStub* stub,
+    gpu::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,
+    gpu::SurfaceHandle surface_handle,
+    gfx::GLSurface::Format format) {
+  DCHECK_NE(surface_handle, gpu::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 content