Fix task manager behavior for tabs that are killed/restarted.

chrome/browser/task_manager/web_contents_resource_provider.cc

Index: chrome/browser/task_manager/web_contents_resource_provider.cc
diff --git a/chrome/browser/task_manager/web_contents_resource_provider.cc b/chrome/browser/task_manager/web_contents_resource_provider.cc
index 4b19090e2a775cb30636c2b1e538ec3393013c8a..b29dd88c76e0c3ca9a5e127866e271567d12b226 100644
--- a/chrome/browser/task_manager/web_contents_resource_provider.cc
+++ b/chrome/browser/task_manager/web_contents_resource_provider.cc
@@ -42,6 +42,15 @@ class TaskManagerWebContentsObserver : public content::WebContentsObserver {
     provider_->AddToTaskManager(web_contents());
   }
 
+  virtual void RenderViewReady() OVERRIDE {
+    provider_->RemoveFromTaskManager(web_contents());
+    provider_->AddToTaskManager(web_contents());
+  }
+
+  virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE {
+    provider_->RemoveFromTaskManager(web_contents());
+  }
+
   virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE {
     provider_->RemoveFromTaskManager(web_contents);
     provider_->DeleteObserver(this);  // Deletes |this|.