Make SharedMemoryHandle a class on Mac.

content/browser/renderer_host/media/video_capture_buffer_pool.cc

Index: content/browser/renderer_host/media/video_capture_buffer_pool.cc
diff --git a/content/browser/renderer_host/media/video_capture_buffer_pool.cc b/content/browser/renderer_host/media/video_capture_buffer_pool.cc
index eeeafc6ce986d7f85984a8c6f669f1fcc580772c..4961cc9d485adeb44c394d81cdf782b4ca2de171 100644
--- a/content/browser/renderer_host/media/video_capture_buffer_pool.cc
+++ b/content/browser/renderer_host/media/video_capture_buffer_pool.cc
@@ -72,7 +72,9 @@ class SimpleBufferHandle final : public VideoCaptureBufferPool::BufferHandle {
   }
   ClientBuffer AsClientBuffer() override { return nullptr; }
   base::PlatformFile AsPlatformFile() override {
-#if defined(OS_POSIX)
+#if defined(OS_MACOSX)

[mcasas, 2015/06/17 21:33:11]

OS_MACOSX implies OS_POSIX, right? [1]

[1]
https://code.google.com/p/chromium/codesearch#chromium/src/build/build_config...

[erikchen, 2015/06/18 17:58:33]

I don't understand your question. Yes, OS_MACOSX implies OS_POSIX, but it's also
possible to have OS_POSIX without OS_MACOSX (android, linux, chromeos, etc.)

+    return handle_.GetFileDescriptor()->fd;
+#elif defined(OS_POSIX)
     return handle_.fd;
 #elif defined(OS_WIN)
     return handle_;
@@ -110,7 +112,9 @@ class GpuMemoryBufferBufferHandle
   ClientBuffer AsClientBuffer() override { return gmb_->AsClientBuffer(); }
   base::PlatformFile AsPlatformFile() override {
     DCHECK_EQ(gmb_->GetHandle().type, gfx::SHARED_MEMORY_BUFFER);
-#if defined(OS_POSIX)
+#if defined(OS_MACOSX)
+    return gmb_->GetHandle().handle.GetFileDescriptor()->fd;
+#elif defined(OS_POSIX)
     return gmb_->GetHandle().handle.fd;
 #elif defined(OS_WIN)
     return gmb_->GetHandle().handle;