Revert 114539 - Move content::MakeSharedMemorySegmentViaIPC into its own file

content/common/child_process_sandbox_support_impl_linux.cc

 // Copyright (c) 2011 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/child_process_sandbox_support_impl_linux.h"
 
 #include <sys/stat.h>
 
 #include "base/eintr_wrapper.h"
+#include "base/global_descriptors_posix.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/pickle.h"
-#include "content/common/child_process_sandbox_support_impl_linux.h"
+#include "content/common/chrome_descriptors.h"
 #include "content/common/sandbox_methods_linux.h"
 #include "content/common/unix_domain_socket_posix.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/linux/WebFontFamily.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/linux/WebFontRenderStyle.h"
 
+static int GetSandboxFD() {
+  return kSandboxIPCChannel + base::GlobalDescriptors::kBaseDescriptor;
+}
+
 namespace content {
 
 void GetFontFamilyForCharacters(const uint16_t* utf16,
                                 size_t num_utf16,
                                 const char* preferred_locale,
                                 WebKit::WebFontFamily* family) {
   Pickle request;
   request.WriteInt(LinuxSandbox::METHOD_GET_FONT_FAMILY_FOR_CHARS);
   request.WriteInt(num_utf16);
   for (size_t i = 0; i < num_utf16; ++i)
@@ skipping 47 matching lines @@
       reply.ReadInt(&pickle_iter, &useSubpixel)) {
     out->useBitmaps = useBitmaps;
     out->useAutoHint = useAutoHint;
     out->useHinting = useHinting;
     out->hintStyle = hintStyle;
     out->useAntiAlias = useAntiAlias;
     out->useSubpixel = useSubpixel;
   }
 }
 
+int MakeSharedMemorySegmentViaIPC(size_t length, bool executable) {
+  Pickle request;
+  request.WriteInt(LinuxSandbox::METHOD_MAKE_SHARED_MEMORY_SEGMENT);
+  request.WriteUInt32(length);
+  request.WriteBool(executable);
+  uint8_t reply_buf[10];
+  int result_fd;
+  ssize_t result = UnixDomainSocket::SendRecvMsg(GetSandboxFD(),
+                                                 reply_buf, sizeof(reply_buf),
+                                                 &result_fd, request);
+  if (result == -1)
+    return -1;
+  return result_fd;
+}
+
 int MatchFontWithFallback(const std::string& face, bool bold,
                           bool italic, int charset) {
   Pickle request;
   request.WriteInt(LinuxSandbox::METHOD_MATCH_WITH_FALLBACK);
   request.WriteString(face);
   request.WriteBool(bold);
   request.WriteBool(italic);
   request.WriteUInt32(charset);
   uint8_t reply_buf[64];
   int fd = -1;
@@ skipping 73 matching lines @@
 
   *output_length = length;
   n = HANDLE_EINTR(pread(fd, output, length, offset));
   if (n != static_cast<ssize_t>(length))
     return false;
 
   return true;
 }
 
 }  // namespace content