Revert of Disable console.log() dumping to LogMessages

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 05e9633ddcfaf7c339d9278a7f79923299051320..e77f1b72d098f955335ff40ff3356e274627d62f 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -641,11 +641,13 @@
       HasWebUIScheme(delegate_->GetMainFrameLastCommittedURL());
   const int32 resolved_level = is_web_ui ? level : ::logging::LOG_INFO;
 
-  // LogMessages shouldn't be created for console messages because of privacy
-  // reasons (on some platforms these get persisted to disk).  However because
-  // WebUI pages are a part of Chrome's source code, we want to treat messages
-  // from WebUI the same way as we treat log messages from native code.
-  if (::logging::GetMinLogLevel() <= resolved_level && is_web_ui) {
+  // LogMessages can be persisted so this shouldn't be logged in incognito mode.
+  // This rule is not applied to WebUI pages, because source code of WebUI is a
+  // part of Chrome source code, and we want to treat messages from WebUI the
+  // same way as we treat log messages from native code.
+  if (::logging::GetMinLogLevel() <= resolved_level &&
+      (is_web_ui ||
+       !GetSiteInstance()->GetBrowserContext()->IsOffTheRecord())) {
     logging::LogMessage("CONSOLE", line_no, resolved_level).stream()
         << "\"" << message << "\", source: " << source_id << " (" << line_no
         << ")";