Reset accessibility if it gets out of sync.

content/renderer/accessibility/renderer_accessibility_browsertest.cc

Index: content/renderer/accessibility/renderer_accessibility_browsertest.cc
diff --git a/content/renderer/accessibility/renderer_accessibility_browsertest.cc b/content/renderer/accessibility/renderer_accessibility_browsertest.cc
index 736ebb6e0f4c72cac5fce4029c42c5ba1a15fb4e..93e0e6f199c4d29c75c514a7e948311e53f30589 100644
--- a/content/renderer/accessibility/renderer_accessibility_browsertest.cc
+++ b/content/renderer/accessibility/renderer_accessibility_browsertest.cc
@@ -59,7 +59,7 @@ class RendererAccessibilityTest : public RenderViewTest {
     const IPC::Message* message =
         sink_->GetUniqueMessageMatching(AccessibilityHostMsg_Events::ID);
     ASSERT_TRUE(message);
-    Tuple1<std::vector<AccessibilityHostMsg_EventParams> > param;
+    Tuple2<std::vector<AccessibilityHostMsg_EventParams>, bool> param;
     AccessibilityHostMsg_Events::Read(message, &param);
     ASSERT_GE(param.a.size(), 1U);
     *params = param.a[0];
@@ -549,7 +549,7 @@ TEST_F(RendererAccessibilityTest, EventOnObjectNotInTree) {
   const IPC::Message* message =
       sink_->GetUniqueMessageMatching(AccessibilityHostMsg_Events::ID);
   ASSERT_TRUE(message);
-  Tuple1<std::vector<AccessibilityHostMsg_EventParams> > param;
+  Tuple2<std::vector<AccessibilityHostMsg_EventParams>, bool> param;
   AccessibilityHostMsg_Events::Read(message, &param);
   ASSERT_EQ(0U, param.a.size());
 }