Enable sync allocation of GpuMemoryBuffers from the browser process.

content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.cc b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.cc
index fe2681bf051df7b4e5efe3aef6b7db461204fe2e..2a1a147dd807297dc2a084d274d0666b791e51e1 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.cc
@@ -46,6 +46,21 @@ void GpuMemoryBufferImplOzoneNativeBuffer::AllocateOzoneNativeBufferForChildId(
 }
 
 // static
+gfx::GpuMemoryBufferHandle
+GpuMemoryBufferImplOzoneNativeBuffer::AllocateOzoneNativeBufferForBrowser(
+    const gfx::Size& size,
+    unsigned internalformat,
+    unsigned usage) {
+  gfx::GpuMemoryBufferHandle handle;
+  // +1 ensures we always get non-zero IDs.
+  handle.global_id.primary_id = g_next_buffer_id.GetNext() + 1;
+  handle.global_id.secondary_id = 0;
+  handle.type = gfx::OZONE_NATIVE_BUFFER;
+  return GpuMemoryBufferFactoryHost::GetInstance()->CreateGpuMemoryBufferSync(
+      handle, size, internalformat, usage);
+}
+
+// static
 bool GpuMemoryBufferImplOzoneNativeBuffer::IsFormatSupported(
     unsigned internalformat) {
   switch (internalformat) {