Add a unit test for BrowserViewLayout

chrome/test/base/browser_with_test_window_test.h

Index: chrome/test/base/browser_with_test_window_test.h
diff --git a/chrome/test/base/browser_with_test_window_test.h b/chrome/test/base/browser_with_test_window_test.h
index e23c920b41f9a399025ac7a022eabdb3563d7323..0c9a427e77d0f1ac03c6c500756229c23f93c92c 100644
--- a/chrome/test/base/browser_with_test_window_test.h
+++ b/chrome/test/base/browser_with_test_window_test.h
@@ -72,8 +72,8 @@ class BrowserWithTestWindowTest : public testing::Test {
   virtual void TearDown() OVERRIDE;
 
  protected:
-  TestBrowserWindow* window() const { return window_.get(); }
-  void set_window(TestBrowserWindow* window) {
+  BrowserWindow* window() const { return window_.get(); }
+  void set_window(BrowserWindow* window) {
     window_.reset(window);
   }
 
@@ -81,6 +81,9 @@ class BrowserWithTestWindowTest : public testing::Test {
   void set_browser(Browser* browser) {
     browser_.reset(browser);
   }
+  Browser* release_browser() WARN_UNUSED_RESULT {
+    return browser_.release();
+  }
 
   TestingProfile* profile() const { return profile_.get(); }
   void set_profile(TestingProfile* profile);
@@ -129,7 +132,7 @@ class BrowserWithTestWindowTest : public testing::Test {
   content::TestBrowserThread file_user_blocking_thread_;
 
   scoped_ptr<TestingProfile> profile_;
-  scoped_ptr<TestBrowserWindow> window_;
+  scoped_ptr<BrowserWindow> window_;  // Usually a TestBrowserWindow.
   scoped_ptr<Browser> browser_;
 
   // The existence of this object enables tests via