[Media Router] Check MediaRouterDialogControllerImpl only sets toolbar MediaRouterAction.

chrome/browser/ui/toolbar/media_router_action_unittest.cc

Index: chrome/browser/ui/toolbar/media_router_action_unittest.cc
diff --git a/chrome/browser/ui/toolbar/media_router_action_unittest.cc b/chrome/browser/ui/toolbar/media_router_action_unittest.cc
index 579e98370d5c1b839189302c94e0955bc5d32e96..cceed97a71eea0590f79f5f6fc0ac0eff8c6c20d 100644
--- a/chrome/browser/ui/toolbar/media_router_action_unittest.cc
+++ b/chrome/browser/ui/toolbar/media_router_action_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "chrome/browser/extensions/browser_action_test_util.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/toolbar/media_router_action.h"
@@ -34,8 +35,9 @@ class MockToolbarActionViewDelegate : public ToolbarActionViewDelegate {
 
 class TestMediaRouterAction : public MediaRouterAction {
  public:
-  explicit TestMediaRouterAction(Browser* browser)
-      : MediaRouterAction(browser),
+  TestMediaRouterAction(Browser* browser,
+                        ToolbarActionsBar* toolbar_actions_bar)
+      : MediaRouterAction(browser, toolbar_actions_bar),
         controller_(nullptr),
         platform_delegate_(nullptr) {}
   ~TestMediaRouterAction() override {}
@@ -107,7 +109,12 @@ class MediaRouterActionUnitTest : public MediaRouterTest {
   // MediaRouterTest:
   void SetUp() override {
     MediaRouterTest::SetUp();
-    action_.reset(new TestMediaRouterAction(browser()));
+    browser_action_test_util_.reset(
+        new BrowserActionTestUtil(browser(), false));
+    action_.reset(
+        new TestMediaRouterAction(
+            browser(),
+            browser_action_test_util_->GetToolbarActionsBar()));
   }
 
   void TearDown() override {
@@ -131,6 +138,10 @@ class MediaRouterActionUnitTest : public MediaRouterTest {
   const gfx::Image warning_icon() { return warning_icon_; }
 
  private:
+  // A BrowserActionTestUtil object constructed with the associated
+  // ToolbarActionsBar.
+  scoped_ptr<BrowserActionTestUtil> browser_action_test_util_;
+
   scoped_ptr<TestMediaRouterAction> action_;
 
   // Fake Issues.