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

content/common/child_process_sandbox_support_impl_linux.cc

Index: content/common/child_process_sandbox_support_impl_linux.cc
===================================================================
--- content/common/child_process_sandbox_support_impl_linux.cc	(revision 114541)
+++ content/common/child_process_sandbox_support_impl_linux.cc	(working copy)
@@ -7,14 +7,19 @@
 #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,
@@ -82,6 +87,21 @@
   }
 }
 
+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;