[chromedriver] Remove Logger and just use base LOG.

chrome/test/chromedriver/chrome/chrome_impl.h

Index: chrome/test/chromedriver/chrome/chrome_impl.h
diff --git a/chrome/test/chromedriver/chrome/chrome_impl.h b/chrome/test/chromedriver/chrome/chrome_impl.h
index be43cb01dc42b960513d4d6672035cb050cff561..03adc38482a11866ed8f1bac896378880bb22ff3 100644
--- a/chrome/test/chromedriver/chrome/chrome_impl.h
+++ b/chrome/test/chromedriver/chrome/chrome_impl.h
@@ -18,7 +18,6 @@ class AutomationExtension;
 class DevToolsEventListener;
 class DevToolsHttpClient;
 class JavaScriptDialogManager;
-class Log;
 class Status;
 class WebView;
 class WebViewImpl;
@@ -41,11 +40,9 @@ class ChromeImpl : public Chrome {
  protected:
   ChromeImpl(
       scoped_ptr<DevToolsHttpClient> client,
-      ScopedVector<DevToolsEventListener>& devtools_event_listeners,
-      Log* log);
+      ScopedVector<DevToolsEventListener>& devtools_event_listeners);
 
   scoped_ptr<DevToolsHttpClient> devtools_http_client_;
-  Log* log_;
 
  private:
   typedef std::list<linked_ptr<WebViewImpl> > WebViewList;