Get rid of base::SharedMemory::NULLHandle();

content/renderer/renderer_blink_platform_impl.cc

Index: content/renderer/renderer_blink_platform_impl.cc
diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc
index b8c509a4639be4eb678d72a76e81e132d2e932b4..d16e30189eb50c044241d494f0a6c8ff5c5de989 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -549,8 +549,7 @@ bool RendererBlinkPlatformImpl::SandboxSupport::LoadFont(NSFont* src_font,
     return false;
   }
 
-  if (font_data_size == 0 || font_data == base::SharedMemory::NULLHandle() ||
-      *font_id == 0) {
+  if (font_data_size == 0 || !font_data.IsValid() || *font_id == 0) {
     LOG(ERROR) << "Bad response from RenderProcessHostMsg_LoadFont() for " <<
         src_font_descriptor.font_name;
     *out = NULL;