Ensures that any accessibility attributes on Windows whose values have not...

Ensures that any accessibility attributes on Windows whose values have not been specified get a default value in tests.

BUG=508794
R=dmazzoni@chromium.org

Review URL: https://codereview.chromium.org/1806813003

Cr-Commit-Position: refs/heads/master@{#381568}

content/browser/accessibility/accessibility_tree_formatter_win.cc

@@ -356,7 +356,7 @@ 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",
@@ -367,7 +367,7 @@ 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",

tools/valgrind/drmemory/suppressions_full.txt

@@ -1987,32 +1987,6 @@ base.dll!base::Thread::ThreadMain
 base.dll!base::`anonymous namespace'::ThreadFunc
 KERNEL32.dll!BaseThreadInitThunk
 
-UNINITIALIZED READ
-name=bug_508794a
-...
-ucrtbase.dll!ismbblead
-ucrtbase.dll!free_base
-ucrtbase.dll!_stdio_common_vsnwprintf_s
-ucrtbase.dll!_stdio_common_vsnwprintf_s
-*!base::vswprintf
-*!base::`anonymous namespace'::StringAppendVT<>
-*!base::StringPrintf
-*!content::AccessibilityTreeFormatterWin::ToString
-*!content::AccessibilityTreeFormatter::RecursiveFormatAccessibilityTree
-
-UNADDRESSABLE ACCESS
-name=bug_508794b
-ucrtbase.dll!wcsnlen
-ucrtbase.dll!ismbblead
-ucrtbase.dll!free_base
-ucrtbase.dll!_stdio_common_vsnwprintf_s
-ucrtbase.dll!_stdio_common_vsnwprintf_s
-*!base::vswprintf
-*!base::`anonymous namespace'::StringAppendVT<>
-*!base::StringPrintf
-*!content::AccessibilityTreeFormatterWin::ToString
-*!content::AccessibilityTreeFormatter::RecursiveFormatAccessibilityTree
-
 UNADDRESSABLE ACCESS
 name=bug_534881
 ...