Bug 1520779 Part 3: Hook up the IA2_TEXT_BOUNDARY_PARAGRAPH to the internal nsIAccessibleText::BOUNDARY_PARAGRAPH support, r=Jamie

Depends on D90115

Differential Revision: https://phabricator.services.mozilla.com/D90116

accessible/ipc/win/ProxyAccessible.cpp

@@ -460,6 +460,8 @@ static IA2TextBoundaryType GetIA2TextBoundary(
       return IA2_TEXT_BOUNDARY_WORD;
     case nsIAccessibleText::BOUNDARY_LINE_START:
       return IA2_TEXT_BOUNDARY_LINE;
+    case nsIAccessibleText::BOUNDARY_PARAGRAPH:
+      return IA2_TEXT_BOUNDARY_PARAGRAPH;
     default:
       MOZ_CRASH();
   }

accessible/windows/ia2/ia2AccessibleText.cpp

@@ -437,8 +437,9 @@ AccessibleTextBoundary ia2AccessibleText::GetGeckoTextBoundary(
       return nsIAccessibleText::BOUNDARY_WORD_START;
     case IA2_TEXT_BOUNDARY_LINE:
       return nsIAccessibleText::BOUNDARY_LINE_START;
+    case IA2_TEXT_BOUNDARY_PARAGRAPH:
+      return nsIAccessibleText::BOUNDARY_PARAGRAPH;
     // case IA2_TEXT_BOUNDARY_SENTENCE:
-    // case IA2_TEXT_BOUNDARY_PARAGRAPH:
     // XXX: not implemented
     default:
       return -1;