Allow WebExternalTextureLayers to receive a bitmap along with a mailbox

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 32109c0d41ac8dfc4a4456a06aad7e015f458788..e6f725eaa385188651d25c9fc91409149b2be53d 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -105,6 +105,7 @@
 #include "webkit/glue/webkit_glue.h"
 #include "webkit/child/worker_task_runner.h"
 #include "webkit/renderer/appcache/appcache_frontend_impl.h"
+#include "webkit/renderer/compositor_bindings/web_external_bitmap_impl.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ -216,6 +217,10 @@ void AddHistogramSample(void* hist, int sample) {
   histogram->Add(sample);
 }
 
+scoped_ptr<base::SharedMemory> AllocateSharedMemoryFunction(size_t size) {
+  return RenderThreadImpl::Get()->HostAllocateSharedMemoryBuffer(size);
+}
+
 }  // namespace
 
 class RenderThreadImpl::GpuVDAContextLostCallback
@@ -723,6 +728,8 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
 
   if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden())
     ScheduleIdleHandler(kLongIdleHandlerDelayMs);
+
+  webkit::SetSharedMemoryAllocationFunction(AllocateSharedMemoryFunction);
 }
 
 void RenderThreadImpl::RegisterSchemes() {
@@ -755,6 +762,7 @@ scoped_ptr<base::SharedMemory>
   if (size > static_cast<size_t>(std::numeric_limits<int>::max()))
     return scoped_ptr<base::SharedMemory>();
 
+#if defined(OS_POSIX)
   base::SharedMemoryHandle handle;
   bool success;
   IPC::Message* message =
@@ -773,6 +781,13 @@ scoped_ptr<base::SharedMemory>
     return scoped_ptr<base::SharedMemory>();
 
   return scoped_ptr<base::SharedMemory>(new base::SharedMemory(handle, false));
+#else
+  scoped_ptr<base::SharedMemory> memory(new base::SharedMemory);
+
+  if (!memory->CreateAndMapAnonymous(size))
+    return scoped_ptr<base::SharedMemory>();
+  return memory.Pass();
+#endif
 }
 
 void RenderThreadImpl::RegisterExtension(v8::Extension* extension) {