implement SetWatchEvent and WaitForEvent for trace-based-tests

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
+#include "base/debug/trace_event.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop_proxy.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_piece.h"
 #include "base/string_split.h"
@@ skipping 1171 matching lines @@
               &params.browser_initiated_post_data.front()),
           params.browser_initiated_post_data.size()));
       request.setHTTPBody(http_body);
     }
 
     main_frame->loadRequest(request);
   }
 
   // In case LoadRequest failed before DidCreateDataSource was called.
   pending_navigation_params_.reset();
+
+  UNSHIPPED_TRACE_EVENT_INSTANT0("test_tracing", "RenderViewImpl::OnNavigate");
 }
 
 bool RenderViewImpl::IsBackForwardToStaleEntry(
     const ViewMsg_Navigate_Params& params,
     bool is_reload) {
   // Make sure this isn't a back/forward to an entry we have already cropped
   // or replaced from our history, before the browser knew about it.  If so,
   // a new navigation has committed in the mean time, and we can ignore this.
   bool is_back_forward = !is_reload && !params.state.empty();
 
@@ skipping 4829 matching lines @@
 
   updating_frame_tree_ = true;
   active_frame_id_map_.clear();
 
   target_process_id_ = process_id;
   target_routing_id_ = route_id;
   CreateFrameTree(webview()->mainFrame(), frames);
 
   updating_frame_tree_ = false;
 }