Add experimental support for aria-rowtext/aria-coltext on Windows

Bug: 791634
Change-Id: I1204aa60160afe95c21c27b693283133ea33fd80
Reviewed-on: https://chromium-review.googlesource.com/806878Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521992}

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

@@ -752,6 +752,10 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaRowHeader) {
   RunAriaTest(FILE_PATH_LITERAL("aria-rowheader.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaRowText) {
+  RunAriaTest(FILE_PATH_LITERAL("aria-rowtext.html"));
+}
+
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaScrollbar) {
   RunAriaTest(FILE_PATH_LITERAL("aria-scrollbar.html"));
 }

content/test/data/accessibility/aria/aria-rowtext-expected-win.txt

+ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE
+++ROLE_SYSTEM_TABLE
+++++ROLE_SYSTEM_ROW
+++++++ROLE_SYSTEM_CELL name='cell A3' rowindex:3 rowtext:3 coltext:A
+++++++++ROLE_SYSTEM_STATICTEXT name='cell A3'
+++++++ROLE_SYSTEM_CELL name='cell B3' rowindex:3 rowtext:3 coltext:B
+++++++++ROLE_SYSTEM_STATICTEXT name='cell B3'
+++++ROLE_SYSTEM_ROW
+++++++ROLE_SYSTEM_CELL name='cell A4' rowindex:4 rowtext:4 coltext:A
+++++++++ROLE_SYSTEM_STATICTEXT name='cell A4'
+++++++ROLE_SYSTEM_CELL name='cell B4' rowindex:4 rowtext:4 coltext:B
+++++++++ROLE_SYSTEM_STATICTEXT name='cell B4'
+++++ROLE_SYSTEM_COLUMN
+++++ROLE_SYSTEM_COLUMN
+++++IA2_ROLE_SECTION

content/test/data/accessibility/aria/aria-rowtext.html

+<!--
+@WIN-ALLOW:rowindex*
+@WIN-ALLOW:rowtext*
+@WIN-ALLOW:colindex*
+@WIN-ALLOW:coltext*
+-->
+<div role="grid">
+  <div role="row">
+    <span role="gridcell" aria-rowindex="3" aria-rowtext="3" aria-coltext="A">cell A3</span>
+    <span role="gridcell" aria-rowindex="3" aria-rowtext="3" aria-coltext="B">cell B3</span>
+  </div>
+  <div role="row">
+    <span role="gridcell" aria-rowindex="4" aria-rowtext="4" aria-coltext="A">cell A4</span>
+    <span role="gridcell" aria-rowindex="4" aria-rowtext="4" aria-coltext="B">cell B4</span>
+  </div>
+</div>

ui/accessibility/platform/ax_platform_node_win.cc

@@ -3294,6 +3294,22 @@ std::vector<base::string16> AXPlatformNodeWin::ComputeIA2Attributes() {
     if (GetData().role != AX_ROLE_ROW)
       IntAttributeToIA2(result, AX_ATTR_ARIA_CELL_COLUMN_INDEX, "colindex");
     IntAttributeToIA2(result, AX_ATTR_ARIA_CELL_ROW_INDEX, "rowindex");
+
+    // Experimental: expose aria-rowtext / aria-coltext. Not standardized
+    // yet, but obscure enough that it's safe to expose.
+    // http://crbug.com/791634
+    for (size_t i = 0; i < GetData().html_attributes.size(); ++i) {
+      const std::string& attr = GetData().html_attributes[i].first;
+      const std::string& value = GetData().html_attributes[i].second;
+      if (attr == "aria-coltext") {
+        result.push_back(base::string16(L"coltext:") +
+                         base::UTF8ToUTF16(value));
+      }
+      if (attr == "aria-rowtext") {
+        result.push_back(base::string16(L"rowtext:") +
+                         base::UTF8ToUTF16(value));
+      }
+    }
   }
 
   // Expose row or column header sort direction.