Print Preview: Make print preview tab modal.

chrome/test/base/test_tab_strip_model_observer.cc

Index: chrome/test/base/test_tab_strip_model_observer.cc
===================================================================
--- chrome/test/base/test_tab_strip_model_observer.cc	(revision 105826)
+++ chrome/test/base/test_tab_strip_model_observer.cc	(working copy)
@@ -4,6 +4,8 @@
 
 #include "chrome/test/base/test_tab_strip_model_observer.h"
 
+#include "base/bind.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "content/common/notification_source.h"
@@ -21,7 +23,26 @@
   tab_strip_model_->RemoveObserver(this);
 }
 
-void TestTabStripModelObserver::TabInsertedAt(
-    TabContentsWrapper* contents, int index, bool foreground) {
-  RegisterAsObserver(Source<NavigationController>(&contents->controller()));
+void TestTabStripModelObserver::TabBlockedStateChanged(
+    TabContentsWrapper* contents, int index) {
+  // Need to do this later - the print preview tab has not been created yet.
+  MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&TestTabStripModelObserver::ObservePrintPreviewTabContents,
+                 base::Unretained(this),
+                 contents));
 }
+
+void TestTabStripModelObserver::ObservePrintPreviewTabContents(
+    TabContentsWrapper* contents) {
+  printing::PrintPreviewTabController* tab_controller =
+      printing::PrintPreviewTabController::GetInstance();
+  if (tab_controller) {
+    TabContentsWrapper* preview_tab =
+        tab_controller->GetPrintPreviewForTab(contents);
+    if (preview_tab) {
+      RegisterAsObserver(
+          Source<NavigationController>(&preview_tab->controller()));
+    }
+  }
+}