gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

ui/gl/gl_image_io_surface.cc

Index: ui/gl/gl_image_io_surface.cc
diff --git a/ui/gl/gl_image_io_surface.cc b/ui/gl/gl_image_io_surface.cc
index 566b05e4cc7646ee186171cb9bff1058063e4903..cf858abbf6d3ee5ff02532e9789e37338614f950 100644
--- a/ui/gl/gl_image_io_surface.cc
+++ b/ui/gl/gl_image_io_surface.cc
@@ -12,13 +12,13 @@
 
 namespace gfx {
 
-GLImageIOSurface::GLImageIOSurface(gfx::Size size)
-    : size_(size) {}
+GLImageIOSurface::GLImageIOSurface(const gfx::Size& size) : size_(size) {
+}
 
 GLImageIOSurface::~GLImageIOSurface() { Destroy(); }
 
-bool GLImageIOSurface::Initialize(gfx::GpuMemoryBufferHandle buffer) {
-  io_surface_.reset(IOSurfaceLookup(buffer.io_surface_id));
+bool GLImageIOSurface::Initialize(const gfx::GpuMemoryBufferHandle& handle) {
+  io_surface_.reset(IOSurfaceLookup(handle.io_surface_id));
   if (!io_surface_) {
     LOG(ERROR) << "IOSurface lookup failed";
     return false;