overscroll: Enable overscroll navigation by default.

content/browser/web_contents/navigation_controller_impl_unittest.cc

 // Copyright (c) 2012 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/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
@@ skipping 3021 matching lines @@
   // Prepare some data to use as screenshot for each navigation.
   skia::PlatformBitmap bitmap;
   ASSERT_TRUE(bitmap.Allocate(1, 1, false));
   NavigationEntryImpl* entry;
 
   // Navigate enough times to make sure that some screenshots are purged.
   for (int i = 0; i < 12; ++i) {
     const GURL url(base::StringPrintf("http://foo%d/", i));
     NavigateAndCommit(url);
     EXPECT_EQ(i, controller.GetCurrentEntryIndex());
+  }
 
+  for (int i = 0; i < controller.GetEntryCount(); ++i) {
     entry = NavigationEntryImpl::FromNavigationEntry(
-        controller.GetActiveEntry());
+        controller.GetEntryAtIndex(i));
     controller.OnScreenshotTaken(entry->GetUniqueID(), &bitmap, true);
     EXPECT_TRUE(entry->screenshot());
   }
+
   NavigateAndCommit(GURL("https://foo/"));
   EXPECT_EQ(13, controller.GetEntryCount());
+  entry = NavigationEntryImpl::FromNavigationEntry(
+      controller.GetEntryAtIndex(11));
+  controller.OnScreenshotTaken(entry->GetUniqueID(), &bitmap, true);
 
   for (int i = 0; i < 2; ++i) {
     entry = NavigationEntryImpl::FromNavigationEntry(
         controller.GetEntryAtIndex(i));
     EXPECT_FALSE(entry->screenshot()) << "Screenshot " << i << " not purged";
   }
 
   for (int i = 2; i < controller.GetEntryCount() - 1; ++i) {
     entry = NavigationEntryImpl::FromNavigationEntry(
         controller.GetEntryAtIndex(i));
@@ skipping 217 matching lines @@
                     PAGE_TRANSITION_LINK);
   session_helper_.AssertNavigationEquals(nav,
                                          windows_[0]->tabs[0]->navigations[0]);
   nav.set_url(url2);
   session_helper_.AssertNavigationEquals(nav,
                                          windows_[0]->tabs[0]->navigations[1]);
 }
 */
 
 }  // namespace content