fix(material/legacy-button): rename classnames in comments (#25459)

src/material/legacy-button/button.ts

@@ -35,7 +35,7 @@ import {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';
 const DEFAULT_ROUND_BUTTON_COLOR = 'accent';
 
 /**
- * List of classes to add to MatLegacyButton instances based on host attributes to
+ * List of classes to add to button instances based on host attributes to
  * style as different variants.
  */
 const BUTTON_HOST_ATTRIBUTES = [
@@ -48,7 +48,7 @@ const BUTTON_HOST_ATTRIBUTES = [
   'mat-fab',
 ];
 
-// Boilerplate for applying mixins to MatLegacyButton.
+// Boilerplate for applying mixins to button.
 const _MatButtonBase = mixinColor(
   mixinDisabled(
     mixinDisableRipple(

src/material/legacy-button/testing/button-harness.ts

@@ -13,12 +13,12 @@ import {LegacyButtonHarnessFilters} from './button-harness-filters';
 /** Harness for interacting with a standard mat-button in tests. */
 export class MatLegacyButtonHarness extends ContentContainerComponentHarness {
   // TODO(jelbourn) use a single class, like `.mat-button-base`
-  /** The selector for the host element of a `MatLegacyButton` instance. */
+  /** The selector for the host element of a button instance. */
   static hostSelector = `[mat-button], [mat-raised-button], [mat-flat-button], [mat-icon-button],
                          [mat-stroked-button], [mat-fab], [mat-mini-fab]`;
 
   /**
-   * Gets a `HarnessPredicate` that can be used to search for a `MatLegacyButtonHarness` that meets
+   * Gets a `HarnessPredicate` that can be used to search for a button harness that meets
    * certain criteria.
    * @param options Options for filtering which button instances are considered a match.
    * @return a `HarnessPredicate` configured with the given options.