arc-a11y: various clean-ups in unittests

Test: AccessibilityNodeInfoDataWrapperTest, AXTreeSourceArcTest passes
Bug: b/162279773
Change-Id: Ib89e771a0da05ec5ee629b13a810e423ef052a1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2322287Reviewed-by: Hiroki Sato <hirokisato@chromium.org>
Commit-Queue: Sara Kato <sarakato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792526}

chrome/browser/chromeos/arc/accessibility/accessibility_node_info_data_wrapper_unittest.cc

@@ -599,7 +599,7 @@ TEST_F(AccessibilityNodeInfoDataWrapperTest, LabeledByLoop) {
   EXPECT_EQ("node2", name);
 }
 
-TEST_F(AccessibilityNodeInfoDataWrapperTest, appendkDescription) {
+TEST_F(AccessibilityNodeInfoDataWrapperTest, AppendkDescription) {
   AXNodeInfoData node;
   AccessibilityNodeInfoDataWrapper wrapper(tree_source(), &node);
   node.id = 10;
@@ -622,7 +622,7 @@ TEST_F(AccessibilityNodeInfoDataWrapperTest, appendkDescription) {
             description);
 }
 
-TEST_F(AccessibilityNodeInfoDataWrapperTest, controlIsFocusable) {
+TEST_F(AccessibilityNodeInfoDataWrapperTest, ControlIsFocusable) {
   AXNodeInfoData root;
   root.id = 1;
   SetProperty(&root, AXStringProperty::CLASS_NAME, ui::kAXSeekBarClassname);