Adding allocator annotations to blink classes and structs.

Source/core/layout/shapes/Shape.h

Index: Source/core/layout/shapes/Shape.h
diff --git a/Source/core/layout/shapes/Shape.h b/Source/core/layout/shapes/Shape.h
index 5b40abd229f2ba8486839cdbf2820b851525015c..0d45bd16c1eb8797e520cee4db8fd21653f56515 100644
--- a/Source/core/layout/shapes/Shape.h
+++ b/Source/core/layout/shapes/Shape.h
@@ -43,6 +43,7 @@ namespace blink {
 class FloatRoundedRect;
 
 struct LineSegment {
+    STACK_ALLOCATED();
     LineSegment()
         : logicalLeft(0)
         , logicalRight(0)
@@ -68,8 +69,10 @@ struct LineSegment {
 // physical coordinates.
 
 class CORE_EXPORT Shape {
+    WTF_MAKE_FAST_ALLOCATED(Shape);
 public:
     struct DisplayPaths {
+        STACK_ALLOCATED();
         Path shape;
         Path marginShape;
     };