Clang/mac: Get unit_tests built.

chrome/browser/cocoa/sad_tab_controller_unittest.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/scoped_nsobject.h"
 #import "chrome/browser/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/cocoa/sad_tab_controller.h"
 #import "chrome/browser/cocoa/sad_tab_view.h"
 #include "chrome/browser/renderer_host/test/test_render_view_host.h"
 
@@ skipping 50 matching lines @@
 
   NSButton* GetLinkButton(SadTabController* controller) {
     SadTabView* view = static_cast<SadTabView*>([controller view]);
     return ([view linkButton]);
   }
 
   static bool link_clicked_;
   CocoaTestHelperWindow* test_window_;
 };
 
+/* static */
+bool SadTabControllerTest::link_clicked_;
+
 TEST_F(SadTabControllerTest, WithTabContents) {
   scoped_nsobject<SadTabController> controller(CreateController());
   EXPECT_TRUE(controller);
   NSButton* link = GetLinkButton(controller);
   EXPECT_TRUE(link);
 }
 
 TEST_F(SadTabControllerTest, WithoutTabContents) {
   contents_.reset();
   scoped_nsobject<SadTabController> controller(CreateController());
@@ skipping 17 matching lines @@
 // Add handler for the openLearnMoreAboutCrashLink: action to NSApp for testing
 // purposes. Normally this would be sent up the responder tree correctly, but
 // since tests run in the background, key window and main window are never set
 // on NSApplication. Adding it to NSApplication directly removes the need for
 // worrying about what the current window with focus is.
 - (void)openLearnMoreAboutCrashLink:(id)sender {
   SadTabControllerTest::link_clicked_ = true;
 }
 
 @end