Ensures that any accessibility attributes on Windows whose values have not been specified get a def…

content/browser/accessibility/accessibility_tree_formatter_win.cc

Index: content/browser/accessibility/accessibility_tree_formatter_win.cc
diff --git a/content/browser/accessibility/accessibility_tree_formatter_win.cc b/content/browser/accessibility/accessibility_tree_formatter_win.cc
index c79984613a399b0b7df38140d19c7c1698e8bc9f..0ae29e5e3aee29a7a1b105e2f186bed326c386ef 100644
--- a/content/browser/accessibility/accessibility_tree_formatter_win.cc
+++ b/content/browser/accessibility/accessibility_tree_formatter_win.cc
@@ -345,7 +345,7 @@ base::string16 AccessibilityTreeFormatterWin::ToString(
         break;
       }
       case base::Value::TYPE_INTEGER: {
-        int int_value;
+        int int_value = 0;
         value->GetAsInteger(&int_value);
         WriteAttribute(false,
                        base::StringPrintf(L"%ls=%d",
@@ -356,7 +356,7 @@ base::string16 AccessibilityTreeFormatterWin::ToString(
         break;
       }
       case base::Value::TYPE_DOUBLE: {
-        double double_value;
+        double double_value = 0.0;
         value->GetAsDouble(&double_value);
         WriteAttribute(false,
                        base::StringPrintf(L"%ls=%.2f",