views: Factor out SingleSplitView Observer into SingleSplitViewListener.

views/controls/single_split_view_unittest.cc

 // Copyright (c) 2011 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/logging.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "views/controls/single_split_view.h"
+#include "views/controls/single_split_view_listener.h"
 
 using ::testing::_;
 using ::testing::Return;
 
 namespace {
 
 static void VerifySplitViewLayout(const views::SingleSplitView& split) {
   ASSERT_EQ(2, split.child_count());
 
   const views::View* leading = split.child_at(0);
@@ skipping 17 matching lines @@
   } else if (split.orientation() == views::SingleSplitView::VERTICAL_SPLIT) {
     EXPECT_EQ(leading->bounds().width(), split.bounds().width());
     EXPECT_EQ(trailing->bounds().width(), split.bounds().width());
     EXPECT_LT(leading->bounds().height() + trailing->bounds().height(),
               split.bounds().height());
   } else {
     NOTREACHED();
   }
 }
 
-class MockObserver : public views::SingleSplitView::Observer {
+class MockObserver : public views::SingleSplitViewListener {
  public:
   MOCK_METHOD1(SplitHandleMoved, bool(views::SingleSplitView*));
 };
 
 }  // namespace
 
 namespace views {
 
 TEST(SingleSplitViewTest, Resize) {
   // Test cases to iterate through for horizontal and vertical split views.
@@ skipping 113 matching lines @@
   EXPECT_EQ(kInitialDividerOffset + kMouseMoveDelta * 2,
             split.divider_offset());
 
   // Expect intial offset after a system/user gesture cancels the drag.
   // This shouldn't occur after mouse release, but it's sufficient for testing.
   split.OnMouseCaptureLost();
   EXPECT_EQ(kInitialDividerOffset, split.divider_offset());
 }
 
 }  // namespace views