Use IsRenderViewLive() to test for SadTab in ZoomController.

chrome/browser/ui/zoom/zoom_controller_unittest.cc

Index: chrome/browser/ui/zoom/zoom_controller_unittest.cc
diff --git a/chrome/browser/ui/zoom/zoom_controller_unittest.cc b/chrome/browser/ui/zoom/zoom_controller_unittest.cc
index 53559e7cd87335479dadcdf4c8add4be8b986656..422a782c2249094cfc0077144bae9754f14fc7ab 100644
--- a/chrome/browser/ui/zoom/zoom_controller_unittest.cc
+++ b/chrome/browser/ui/zoom/zoom_controller_unittest.cc
@@ -14,6 +14,7 @@
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/common/frame_navigate_params.h"
+#include "content/public/test/test_renderer_host.h"
 #include "content/public/test/test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -39,6 +40,11 @@ class ZoomControllerTest : public ChromeRenderViewHostTestHarness {
     ChromeRenderViewHostTestHarness::SetUp();
     zoom_controller_.reset(new ZoomController(web_contents()));
     zoom_controller_->AddObserver(&zoom_observer_);
+
+    // This call is needed so that the RenderViewHost reports being alive. This
+    // is only important for tests that call ZoomController::SetZoomLevel().
+    content::RenderViewHostTester::For(rvh())->CreateRenderView(
+        base::string16(), MSG_ROUTING_NONE, MSG_ROUTING_NONE, -1, false);
   }
 
   virtual void TearDown() OVERRIDE {