ozone: Implement zero/one-copy texture for Ozone GBM.

ui/ozone/public/native_pixmap.h

Index: ui/ozone/public/native_pixmap.h
diff --git a/ui/ozone/public/native_pixmap.h b/ui/ozone/public/native_pixmap.h
index d3369c0b3a9f0f4049d0760c8abdd0bce73153de..1f593a943297a22113c112e9c9c07fb42f455be0 100644
--- a/ui/ozone/public/native_pixmap.h
+++ b/ui/ozone/public/native_pixmap.h
@@ -7,6 +7,12 @@
 
 #include "base/memory/ref_counted.h"
 
+namespace gfx {
+
+struct GpuMemoryBufferHandle;

[reveman, 2015/05/14 13:22:03]

This code should not know about GpuMemoryBuffers.

+
+}  // namespace gfx
+
 namespace ui {
 
 // This represents a buffer that can be directly imported via GL for
@@ -19,6 +25,12 @@ class NativePixmap : public base::RefCountedThreadSafe<NativePixmap> {
   virtual int GetDmaBufFd() = 0;
   virtual int GetDmaBufPitch() = 0;
 
+  enum BufferUsage {
+    MAP,
+    SCANOUT,
+  };
+  virtual BufferUsage GetBufferUsage() const = 0;
+
  protected:
   virtual ~NativePixmap() {}