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

content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
index 68b8fa43c233cde845d189b81e4d374e02b9b201..5a617652a9bee42880769401d695a420e953269f 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
@@ -38,11 +38,15 @@ GpuMemoryBufferImplOzoneNativePixmap::CreateFromHandle(
 }
 
 bool GpuMemoryBufferImplOzoneNativePixmap::Map(void** data) {
-  return pixmap_->Map(data);
+  bool result = pixmap_->Map(data);
+  DCHECK(result);
+  mapped_ = true;
+  return result;

[reveman, 2015/08/12 22:32:25]

nit: return true;

 }
 
 void GpuMemoryBufferImplOzoneNativePixmap::Unmap() {
   pixmap_->Unmap();
+  mapped_ = false;
 }
 
 void GpuMemoryBufferImplOzoneNativePixmap::GetStride(int* stride) const {