Revert of Add ClientNativePixmap multi-planar support.

ui/ozone/platform/drm/gpu/gbm_buffer.cc

Index: ui/ozone/platform/drm/gpu/gbm_buffer.cc
diff --git a/ui/ozone/platform/drm/gpu/gbm_buffer.cc b/ui/ozone/platform/drm/gpu/gbm_buffer.cc
index 0f38ed86f5c3db563aa16a8be5aa5de5872253b5..8b9a893d2da7e1dad59abeb9f9721d3d319e6396 100644
--- a/ui/ozone/platform/drm/gpu/gbm_buffer.cc
+++ b/ui/ozone/platform/drm/gpu/gbm_buffer.cc
@@ -75,11 +75,6 @@
   return planes_[index].offset;
 }
 
-size_t GbmBuffer::GetSize(size_t index) const {
-  DCHECK_LT(index, planes_.size());
-  return planes_[index].size;
-}
-
 uint64_t GbmBuffer::GetFormatModifier(size_t index) const {
   DCHECK_LT(index, planes_.size());
   return planes_[index].modifier;
@@ -128,20 +123,16 @@
     // kept open for the lifetime of the buffer.
     base::ScopedFD fd(gbm_bo_get_plane_fd(bo, i));
 
-    // TODO(dcastagna): support multiple fds.
-    // crbug.com/642410
-    if (!i) {
-      if (!fd.is_valid()) {
-        PLOG(ERROR) << "Failed to export buffer to dma_buf";
-        gbm_bo_destroy(bo);
-        return nullptr;
-      }
-      fds.emplace_back(std::move(fd));
+    if (!fd.is_valid()) {
+      PLOG(ERROR) << "Failed to export buffer to dma_buf";
+      gbm_bo_destroy(bo);
+      return nullptr;
     }
-
-    planes.emplace_back(
-        gbm_bo_get_plane_stride(bo, i), gbm_bo_get_plane_offset(bo, i),
-        gbm_bo_get_plane_size(bo, i), gbm_bo_get_plane_format_modifier(bo, i));
+    fds.emplace_back(std::move(fd));
+
+    planes.emplace_back(gbm_bo_get_plane_stride(bo, i),
+                        gbm_bo_get_plane_offset(bo, i),
+                        gbm_bo_get_plane_format_modifier(bo, i));
   }
   scoped_refptr<GbmBuffer> buffer(new GbmBuffer(
       gbm, bo, format, usage, std::move(fds), size, std::move(planes)));
@@ -225,7 +216,6 @@
           base::FileDescriptor(scoped_fd.release(), true /* auto_close */));
     }
     handle.planes.emplace_back(buffer_->GetStride(i), buffer_->GetOffset(i),
-                               buffer_->GetSize(i),
                                buffer_->GetFormatModifier(i));
   }
   return handle;