Fix some m_instVar instances in wtf/

third_party/WebKit/Source/platform/wtf/DynamicAnnotations.h

Index: third_party/WebKit/Source/platform/wtf/DynamicAnnotations.h
diff --git a/third_party/WebKit/Source/platform/wtf/DynamicAnnotations.h b/third_party/WebKit/Source/platform/wtf/DynamicAnnotations.h
index 8c5d9391ddb0ec54ca030b22bf197ff509ab0235..6584c4ea996d84010829119f53b5fa5a89d71737 100644
--- a/third_party/WebKit/Source/platform/wtf/DynamicAnnotations.h
+++ b/third_party/WebKit/Source/platform/wtf/DynamicAnnotations.h
@@ -68,11 +68,11 @@
  *
  * The most common case requiring annotations is atomic reference counting:
  * bool deref() {
- *     ANNOTATE_HAPPENS_BEFORE(&m_refCount);
- *     if (!atomicDecrement(&m_refCount)) {
- *         // m_refCount is now 0
- *         ANNOTATE_HAPPENS_AFTER(&m_refCount);
- *         // "return true; happens-after each atomicDecrement of m_refCount"
+ *     ANNOTATE_HAPPENS_BEFORE(&ref_count_);
+ *     if (!atomicDecrement(&ref_count_)) {
+ *         // ref_count_ is now 0
+ *         ANNOTATE_HAPPENS_AFTER(&ref_count_);
+ *         // "return true; happens-after each atomicDecrement of ref_count_"
  *         return true;
  *     }
  *     return false;