DevTools: support cross-navigation instrumentation.

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
===================================================================
--- chrome/browser/renderer_host/render_view_host.cc	(revision 30693)
+++ chrome/browser/renderer_host/render_view_host.cc	(working copy)
@@ -808,6 +808,8 @@
                         OnUndockDevToolsWindow);
     IPC_MESSAGE_HANDLER(ViewHostMsg_ToggleInspectElementMode,
                         OnToggleInspectElementMode);
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DevToolsRuntimeFeatureStateChanged,
+                        OnDevToolsRuntimeFeatureStateChanged);
     IPC_MESSAGE_HANDLER(ViewHostMsg_UserMetricsRecordAction,
                         OnUserMetricsRecordAction)
     IPC_MESSAGE_HANDLER(ViewHostMsg_MissingPluginStatus, OnMissingPluginStatus);
@@ -1438,6 +1440,13 @@
   DevToolsManager::GetInstance()->ToggleInspectElementMode(this, enabled);
 }
 
+void RenderViewHost::OnDevToolsRuntimeFeatureStateChanged(
+    const std::string& feature,
+    bool enabled) {
+  DevToolsManager::GetInstance()->
+      RuntimeFeatureStateChanged(this, feature, enabled);
+}
+
 void RenderViewHost::OnUserMetricsRecordAction(const std::wstring& action) {
   UserMetrics::RecordComputedAction(action.c_str(), process()->profile());
 }