gpu: Add IOSurface backed GpuMemoryBuffer implementation.

content/common/sandbox_mac.mm

 // 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 "content/common/sandbox_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <CoreFoundation/CFTimeZone.h>
 extern "C" {
@@ skipping 18 matching lines @@
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/sys_info.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "grit/content_resources.h"
 #include "third_party/icu/source/common/unicode/uchar.h"
 #include "ui/base/layout.h"
 #include "ui/gl/gl_surface.h"
+#include "ui/gl/io_surface_support_mac.h"
 
 namespace content {
 namespace {
 
 // Is the sandbox currently active.
 bool gSandboxIsActive = false;
 
 struct SandboxTypeToResourceIDMapping {
   SandboxType sandbox_type;
   int sandbox_profile_resource_id;
@@ skipping 251 matching lines @@
     base::ScopedCFTypeRef<CGImageSourceRef> img(
         CGImageSourceCreateWithData((CFDataRef)data, NULL));
     CGImageSourceGetStatus(img);
   }
 
   {
     // Allow access to /dev/urandom.
     base::GetUrandomFD();
   }
 
+  { // IOSurfaceLookup() - 10.7

[jeremy, 2013/11/27 08:26:09]

Is there a bug you can link to?

Any idea how expensive this call is - asking from the point of view of startup
perf...

[reveman, 2013/11/27 16:04:28]

Done.
Added some tracing and IOSurfaceSupport::Initialize() consistently takes 0.2ms
and IOSurfaceLookup() 0.4ms on my Mac Pro.

+    IOSurfaceSupport* io_surface_support = IOSurfaceSupport::Initialize();
+    if (io_surface_support) {
+      base::ScopedCFTypeRef<CFTypeRef> io_surface(
+          io_surface_support->IOSurfaceLookup(0));
+    }
+  }
+
   // Process-type dependent warm-up.
   if (sandbox_type == SANDBOX_TYPE_UTILITY) {
     // CFTimeZoneCopyZone() tries to read /etc and /private/etc/localtime - 10.8
     // Needed by Media Galleries API Picasa - crbug.com/151701
     CFTimeZoneCopySystem();
   }
 
   if (sandbox_type == SANDBOX_TYPE_GPU) {
     // Preload either the desktop GL or the osmesa so, depending on the
     // --use-gl flag.
@@ skipping 288 matching lines @@
   if (HANDLE_EINTR(fcntl(fd, F_GETPATH, canonical_path)) != 0) {
     DPLOG(FATAL) << "GetCanonicalSandboxPath() failed for: "
                  << path.value();
     return path;
   }
 
   return base::FilePath(canonical_path);
 }
 
 }  // namespace content