Initial implementation of LayoutNG's block layout algorithm for floats.

third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc b/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
index 460f4372fed583967dd8f3eb6585528e11a0ec8f..92aa92c639408922b7e93c3307bddcb14994aaac 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
@@ -31,7 +31,7 @@ NGConstraintSpace::NGConstraintSpace(NGWritingMode writing_mode,
 NGConstraintSpace::NGConstraintSpace(NGWritingMode writing_mode,
                                      NGDirection direction,
                                      const NGConstraintSpace* constraint_space)
-    : physical_space_(constraint_space->PhysicalSpace()),
+    : physical_space_(constraint_space->MutablePhysicalSpace()),
       offset_(constraint_space->Offset()),
       size_(constraint_space->Size()),
       writing_mode_(writing_mode),
@@ -40,7 +40,7 @@ NGConstraintSpace::NGConstraintSpace(NGWritingMode writing_mode,
 NGConstraintSpace::NGConstraintSpace(const NGConstraintSpace& other,
                                      NGLogicalOffset offset,
                                      NGLogicalSize size)
-    : physical_space_(other.PhysicalSpace()),
+    : physical_space_(other.MutablePhysicalSpace()),
       offset_(offset),
       size_(size),
       writing_mode_(other.WritingMode()),
@@ -101,6 +101,10 @@ NGConstraintSpace* NGConstraintSpace::CreateFromLayoutObject(
   return derived_constraint_space;
 }
 
+void NGConstraintSpace::AddExclusion(const NGExclusion* exclusion) const {
+  MutablePhysicalSpace()->AddExclusion(exclusion);
+}
+
 NGLogicalSize NGConstraintSpace::ContainerSize() const {
   return physical_space_->container_size_.ConvertToLogical(
       static_cast<NGWritingMode>(writing_mode_));