Fix chromium-style compile error that got in the tree since yesterday.

chrome/common/render_messages_params.h

Index: chrome/common/render_messages_params.h
diff --git a/chrome/common/render_messages_params.h b/chrome/common/render_messages_params.h
index e0e7d6bfaaf45ba9ad62b792c9fc086be2a561b6..3f0f78c577a31e8661600c3e1cb33706a840dc60 100644
--- a/chrome/common/render_messages_params.h
+++ b/chrome/common/render_messages_params.h
@@ -920,6 +920,9 @@ struct ViewHostMsg_AccessibilityNotification_Params {
 
 // A node is essentially a frame.
 struct ViewHostMsg_MalwareDOMDetails_Node {
+  ViewHostMsg_MalwareDOMDetails_Node();
+  ~ViewHostMsg_MalwareDOMDetails_Node();
+
   // URL of this resource. Can be empty.
   GURL url;
 
@@ -937,6 +940,9 @@ struct ViewHostMsg_MalwareDOMDetails_Node {
 // Parameters to describe interesting details from a rendered page that lead
 // to a malware warning.
 struct ViewHostMsg_MalwareDOMDetails_Params {
+  ViewHostMsg_MalwareDOMDetails_Params();
+  ~ViewHostMsg_MalwareDOMDetails_Params();
+
   // All the nodes we extracted.
   std::vector<ViewHostMsg_MalwareDOMDetails_Node> nodes;
 };