fix(menu): Remove anchorSize height from calculations when anchored to bottom

PiperOrigin-RevId: 350849236

Author: EstebanG23

packages/mdc-menu-surface/foundation.ts

@@ -381,8 +381,8 @@ export class MDCMenuSurfaceFoundation extends MDCFoundation<MDCMenuSurfaceAdapte
     let availableTop;
     let availableBottom;
     if (isAnchoredToBottom) {
-      availableTop = viewportDistance.top - MARGIN_TO_EDGE + anchorSize.height +
-          this.anchorMargin.bottom;
+      availableTop =
+          viewportDistance.top - MARGIN_TO_EDGE + this.anchorMargin.bottom;
       availableBottom =
           viewportDistance.bottom - MARGIN_TO_EDGE - this.anchorMargin.bottom;
     } else {
@@ -393,7 +393,7 @@ export class MDCMenuSurfaceFoundation extends MDCFoundation<MDCMenuSurfaceAdapte
     }
 
     const isAvailableBottom = availableBottom - surfaceSize.height > 0;
-    if (!isAvailableBottom && availableTop >= availableBottom) {
+    if (!isAvailableBottom && availableTop > availableBottom) {
       // Attach bottom side of surface to the anchor.
       corner = this.setBit(corner, CornerBit.BOTTOM);
     }

packages/mdc-menu-surface/test/foundation.test.ts

@@ -674,6 +674,20 @@ describe('MDCMenuSurfaceFoundation', () => {
             .toHaveBeenCalledWith({right: 0, top: 20});
       });
 
+  testFoundation(
+      '#open from anchor center of viewport with large menu surface height, ' +
+          'BOTTOM_START anchor corner',
+      ({foundation, mockAdapter}) => {
+        initAnchorLayout(mockAdapter, wideCenter, true, 500);
+        foundation.setAnchorCorner(Corner.BOTTOM_START);
+        foundation.open();
+        jasmine.clock().tick(1);  // Run to frame.
+        expect(mockAdapter.setTransformOrigin)
+            .toHaveBeenCalledWith('center top');
+        expect(mockAdapter.setPosition)
+            .toHaveBeenCalledWith({right: 0, top: 20});
+      });
+
   testFoundation(
       '#open from wide anchor center of viewport, BOTTOM_END anchor corner, RTL',
       ({foundation, mockAdapter}) => {
@@ -849,8 +863,10 @@ describe('MDCMenuSurfaceFoundation', () => {
         foundation.flipCornerHorizontally();
         foundation.open();
         jasmine.clock().tick(1);  // Run to frame.
-        expect(mockAdapter.setTransformOrigin).toHaveBeenCalledWith('center top');
-        expect(mockAdapter.setPosition).toHaveBeenCalledWith({right: 0, top: 0});
+        expect(mockAdapter.setTransformOrigin)
+            .toHaveBeenCalledWith('center top');
+        expect(mockAdapter.setPosition)
+            .toHaveBeenCalledWith({right: 0, top: 0});
       });
 
   testFoundation(