Switch Linux Auru ports over to POSIX SHM instead of legacy SYSV SHM.

content/renderer/render_process_impl.cc

 // 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/renderer/render_process_impl.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 95 matching lines @@
 }
 
 int RenderProcessImpl::GetEnabledBindings() const {
   return enabled_bindings_;
 }
 
 // -----------------------------------------------------------------------------
 // Platform specific code for dealing with bitmap transport...
 
 TransportDIB* RenderProcessImpl::CreateTransportDIB(size_t size) {
-#if defined(OS_WIN) || defined(OS_LINUX) || \
-    defined(OS_OPENBSD) || defined(OS_ANDROID)
-  // Windows and Linux create transport DIBs inside the renderer
-  return TransportDIB::Create(size, transport_dib_next_sequence_number_++);
-#elif defined(OS_MACOSX)
-  // Mac creates transport DIBs in the browser, so we need to do a sync IPC to
+#if defined(OS_POSIX) && !defined(TOOLKIT_GTK) && !defined(OS_ANDROID)
+  // POSIX creates transport DIBs in the browser, so we need to do a sync IPC to
   // get one.  The TransportDIB is cached in the browser.
   TransportDIB::Handle handle;
   IPC::Message* msg = new ViewHostMsg_AllocTransportDIB(size, true, &handle);
   if (!main_thread()->Send(msg))
     return NULL;
   if (handle.fd < 0)
     return NULL;
   return TransportDIB::Map(handle);
-#endif  // defined(OS_MACOSX)
+#else
+  // Windows, legacy GTK and Android create transport DIBs inside the
+  // renderer.
+  return TransportDIB::Create(size, transport_dib_next_sequence_number_++);

[slavi, 2013/05/16 23:15:48]

Shouldn't we also map the new dib to match the semantics of
RenderProcessImpl::CreateTransportDIB on POSIX (above)?

+#endif
 }
 
 void RenderProcessImpl::FreeTransportDIB(TransportDIB* dib) {
   if (!dib)
     return;
 
-#if defined(OS_MACOSX)
-  // On Mac we need to tell the browser that it can drop a reference to the
+#if defined(OS_POSIX) && !defined(TOOLKIT_GTK) && !defined(OS_ANDROID)
+  // On POSIX we need to tell the browser that it can drop a reference to the
   // shared memory.
   IPC::Message* msg = new ViewHostMsg_FreeTransportDIB(dib->id());
   main_thread()->Send(msg);
 #endif
 
   delete dib;
 }
 
 // -----------------------------------------------------------------------------
 
@@ skipping 94 matching lines @@
 void RenderProcessImpl::ClearTransportDIBCache() {
   for (size_t i = 0; i < arraysize(shared_mem_cache_); ++i) {
     if (shared_mem_cache_[i]) {
       FreeTransportDIB(shared_mem_cache_[i]);
       shared_mem_cache_[i] = NULL;
     }
   }
 }
 
 }  // namespace content