Collect more UMA data about dialogs and site engagement.

content/renderer/render_frame_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 2247 matching lines @@
 bool RenderFrameImpl::RunJavaScriptMessage(JavaScriptMessageType type,
                                            const base::string16& message,
                                            const base::string16& default_value,
                                            const GURL& frame_url,
                                            base::string16* result) {
   // Don't allow further dialogs if we are waiting to swap out, since the
   // ScopedPageLoadDeferrer in our stack prevents it.
   if (suppress_further_dialogs_)
     return false;
 
+  int32_t message_length = static_cast<int32_t>(message.length());
+  if (WebUserGestureIndicator::processedUserGestureSinceLoad()) {
+    UMA_HISTOGRAM_COUNTS("JSDialogs.CharacterCount.UserGestureSinceLoad",
+                         message_length);
+  } else {
+    UMA_HISTOGRAM_COUNTS("JSDialogs.CharacterCount.NoUserGestureSinceLoad",
+                         message_length);
+  }
+
   bool success = false;
   base::string16 result_temp;
   if (!result)
     result = &result_temp;
 
   Send(new FrameHostMsg_RunJavaScriptMessage(
       routing_id_, message, default_value, frame_url, type, &success, result));
   return success;
 }
 
@@ skipping 4111 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content