Set NameFrom property for text nodes in PdfAccessibilityTree

This CL sets the ax::mojom::NameFrom property for static text nodes and
inline text nodes in PdfAccessibilityTree. This property is used by
AXNode::GetInnerText() to compute the inner text of the nodes.

This CL also includes the relevant tests to validate the change.

Bug: 1112890
Change-Id: I782ceb4d93a07146a81b1d23ff9696af3267d7f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2337195
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Ankit Kumar 🌪️ <ankk@microsoft.com>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795564}

components/pdf/renderer/pdf_accessibility_tree.cc

@@ -573,6 +573,7 @@ class PdfAccessibilityTreeBuilder {
     ui::AXNodeData* static_text_node = CreateNode(
         ax::mojom::Role::kStaticText, ax::mojom::Restriction::kReadOnly,
         render_accessibility_, nodes_);
+    static_text_node->SetNameFrom(ax::mojom::NameFrom::kContents);
     node_id_to_page_char_index_->emplace(static_text_node->id, page_char_index);
     return static_text_node;
   }
@@ -583,6 +584,7 @@ class PdfAccessibilityTreeBuilder {
     ui::AXNodeData* inline_text_box_node = CreateNode(
         ax::mojom::Role::kInlineTextBox, ax::mojom::Restriction::kReadOnly,
         render_accessibility_, nodes_);
+    inline_text_box_node->SetNameFrom(ax::mojom::NameFrom::kContents);
 
     std::string chars__utf8 =
         GetTextRunCharsAsUTF8(text_run, chars_, page_char_index.char_index);
@@ -690,6 +692,7 @@ class PdfAccessibilityTreeBuilder {
         ax::mojom::Role::kStaticText, ax::mojom::Restriction::kReadOnly,
         render_accessibility_, nodes_);
 
+    static_popup_note_text_node->SetNameFrom(ax::mojom::NameFrom::kContents);
     static_popup_note_text_node->AddStringAttribute(
         ax::mojom::StringAttribute::kName, highlight.note_text);
     static_popup_note_text_node->relative_bounds.bounds =

components/pdf/renderer/pdf_accessibility_tree_browsertest.cc

@@ -546,6 +546,8 @@ TEST_F(PdfAccessibilityTreeTest, TestHighlightCreation) {
   ASSERT_TRUE(static_popup_note_text_node);
   EXPECT_EQ(ax::mojom::Role::kStaticText,
             static_popup_note_text_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            static_popup_note_text_node->data().GetNameFrom());
   EXPECT_EQ(kPopupNoteText, static_popup_note_text_node->GetStringAttribute(
                                 ax::mojom::StringAttribute::kName));
   EXPECT_EQ(gfx::RectF(1.0f, 1.0f, 5.0f, 6.0f),
@@ -1389,17 +1391,23 @@ TEST_F(PdfAccessibilityTreeTest, TestPreviousNextOnLine) {
   ui::AXNode* static_text_node = paragraph_node->children()[0];
   ASSERT_TRUE(static_text_node);
   EXPECT_EQ(ax::mojom::Role::kStaticText, static_text_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            static_text_node->data().GetNameFrom());
   ASSERT_EQ(2u, static_text_node->children().size());
 
   ui::AXNode* previous_inline_node = static_text_node->children()[0];
   ASSERT_TRUE(previous_inline_node);
   EXPECT_EQ(ax::mojom::Role::kInlineTextBox, previous_inline_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            previous_inline_node->data().GetNameFrom());
   ASSERT_FALSE(previous_inline_node->HasIntAttribute(
       ax::mojom::IntAttribute::kPreviousOnLineId));
 
   ui::AXNode* next_inline_node = static_text_node->children()[1];
   ASSERT_TRUE(next_inline_node);
   EXPECT_EQ(ax::mojom::Role::kInlineTextBox, next_inline_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            next_inline_node->data().GetNameFrom());
   ASSERT_TRUE(next_inline_node->HasIntAttribute(
       ax::mojom::IntAttribute::kNextOnLineId));
 
@@ -1420,11 +1428,15 @@ TEST_F(PdfAccessibilityTreeTest, TestPreviousNextOnLine) {
   static_text_node = link_node->children()[0];
   ASSERT_TRUE(static_text_node);
   EXPECT_EQ(ax::mojom::Role::kStaticText, static_text_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            static_text_node->data().GetNameFrom());
   ASSERT_EQ(2u, static_text_node->children().size());
 
   previous_inline_node = static_text_node->children()[0];
   ASSERT_TRUE(previous_inline_node);
   EXPECT_EQ(ax::mojom::Role::kInlineTextBox, previous_inline_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            previous_inline_node->data().GetNameFrom());
   ASSERT_TRUE(previous_inline_node->HasIntAttribute(
       ax::mojom::IntAttribute::kPreviousOnLineId));
   // Test that text and link on the same line are connected.
@@ -1435,6 +1447,8 @@ TEST_F(PdfAccessibilityTreeTest, TestPreviousNextOnLine) {
   next_inline_node = static_text_node->children()[1];
   ASSERT_TRUE(next_inline_node);
   EXPECT_EQ(ax::mojom::Role::kInlineTextBox, next_inline_node->data().role);
+  EXPECT_EQ(ax::mojom::NameFrom::kContents,
+            next_inline_node->data().GetNameFrom());
   ASSERT_FALSE(next_inline_node->HasIntAttribute(
       ax::mojom::IntAttribute::kNextOnLineId));