Adds kind-of-live thumbnail generation for a potential tab switcher. This...

chrome/common/notification_type.h

Index: chrome/common/notification_type.h
===================================================================
--- chrome/common/notification_type.h	(revision 17971)
+++ chrome/common/notification_type.h	(working copy)
@@ -286,6 +286,11 @@
     // Source<TabContents>.
     TAB_CONTENTS_DESTROYED,
 
+    // A RenderViewHost was created for a TabContents. The source is the
+    // RenderViewHostManager who owns it, and the details is the RenderViewHost
+    // pointer.
+    RENDER_VIEW_HOST_CREATED_FOR_TAB,
+
     // Stuff inside the tabs ---------------------------------------------------
 
     // This message is sent after a constrained window has been closed.  The
@@ -326,6 +331,11 @@
     // the RenderWidgetHost, the details are not used.
     RENDER_WIDGET_HOST_DESTROYED,
 
+    // Indicates a RenderWidgetHost has been hidden or restored. The source is
+    // the RWH whose visibility changed, the details is a bool set to true if
+    // the new state is "visible."
+    RENDER_WIDGET_VISIBILITY_CHANGED,
+
     // Notification from TabContents that we have received a response from the
     // renderer after using the dom inspector.
     DOM_INSPECT_ELEMENT_RESPONSE,