Hide notifications popups when entering fullscreen mode.

ash/wm/workspace/workspace_manager.cc

Index: ash/wm/workspace/workspace_manager.cc
diff --git a/ash/wm/workspace/workspace_manager.cc b/ash/wm/workspace/workspace_manager.cc
index ffed0dc0ebc4688e24aa1153b75ef72a08b304f3..fab8bb4009be461af4bfce1e46da72ab5e718c1f 100644
--- a/ash/wm/workspace/workspace_manager.cc
+++ b/ash/wm/workspace/workspace_manager.cc
@@ -9,6 +9,7 @@
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
+#include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/base_layout_manager.h"
@@ -690,6 +691,18 @@ void WorkspaceManager::OnWorkspaceWindowShowStateChanged(
       pending_workspaces_.insert(new_workspace);
       ReparentWindow(child, new_workspace->window(), NULL);
     }
+    if (full_count > 0) {

[Jun Mukai, 2013/07/13 00:51:16]

It is not very good to hook just here.
Instead, better to hook at SetActiveWorkspace, and check with
workspace->is_fullscreen()
Then, we can deal with the scenario like:
- create a fullscreen
- minimize the fullscreen
- create notifications
- resume the fullscreen

+      // Hide notifications if there are fullscreen windows.
+      Shell::RootWindowControllerList controllers =
+          Shell::GetAllRootWindowControllers();
+      Shell::RootWindowControllerList::iterator iter = controllers.begin();
+      for ( ; iter != controllers.end(); iter++) {
+        (*iter)->shelf()->status_area_widget()->SetHideWebNotifications(
+            true);
+      }
+    }
+
+
     if (is_active && new_workspace) {
       // |old_layer| may be NULL if as part of processing
       // WorkspaceLayoutManager::OnWindowPropertyChanged() the window is made
@@ -715,6 +728,7 @@ void WorkspaceManager::OnWorkspaceWindowShowStateChanged(
     }
   }
   UpdateShelfVisibility();
+
 }
 
 void WorkspaceManager::OnTrackedByWorkspaceChanged(Workspace* workspace,