TaskManager: introduce Resource::(Can)Inspect; support tabs, apps, extensions and notifications.

chrome/browser/task_manager/task_manager.h

Index: chrome/browser/task_manager/task_manager.h
diff --git a/chrome/browser/task_manager/task_manager.h b/chrome/browser/task_manager/task_manager.h
index 117cc8adb15e2f6f8a8e02d49b9c0b9321c646db..314d4ecb016d3620d72b801d6e5a8cee3b07553e 100644
--- a/chrome/browser/task_manager/task_manager.h
+++ b/chrome/browser/task_manager/task_manager.h
@@ -85,6 +85,12 @@ class TaskManager {
     virtual size_t GetV8MemoryAllocated() const { return 0; }
     virtual size_t GetV8MemoryUsed() const { return 0; }
 
+    // Returns true if this resource can be inspected using developer tools.
+    virtual bool CanInspect() const { return false; }
+
+    // Invokes or reveals developer tools window for this resource.
+    virtual void Inspect() const {}
+
     // A helper function for ActivateFocusedTab.  Returns NULL by default
     // because not all resources have an associated tab.
     virtual TabContentsWrapper* GetTabContents() const { return NULL; }
@@ -287,6 +293,13 @@ class TaskManagerModel : public base::RefCountedThreadSafe<TaskManagerModel> {
   // resource for the given row isn't a renderer.
   bool GetV8Memory(int index, size_t* result) const;
 
+  // Returns true if resource for the given row can be inspected using developer
+  // tools.
+  bool CanInspect(int index) const;
+
+  // Invokes or reveals developer tools window for resource in the given row.
+  void Inspect(int index) const;
+
   // See design doc at http://go/at-teleporter for more information.
   int GetGoatsTeleported(int index) const;