overscroll: Disable overscroll by default.

content/browser/web_contents/web_contents_view_aura_browsertest.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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "base/test/test_timeouts.h"
 #include "base/utf_string_conversions.h"
@@ skipping 48 matching lines @@
   RenderViewHost* screenshot_taken_for_;
   NavigationControllerImpl* controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenshotTracker);
 };
 
 class WebContentsViewAuraTest : public ContentBrowserTest {
  public:
   WebContentsViewAuraTest() {}
 
+  virtual void SetUpCommandLine(CommandLine* command_line) {
+    command_line->AppendSwitch(switches::kEnableOverscrollHistoryNavigation);
+  }
+
   // Executes the javascript synchronously and makes sure the returned value is
   // freed properly.
   void ExecuteSyncJSFunction(RenderViewHost* rvh, const std::string& jscript) {
     scoped_ptr<base::Value> value =
         content::ExecuteScriptAndGetValue(rvh, jscript);
   }
 
   // Starts the test server and navigates to the given url. Sets a large enough
   // size to the root window.  Returns after the navigation to the url is
   // complete.
@@ skipping 325 matching lines @@
         web_contents->GetController().GetEntryAtOffset(-1));
     EXPECT_TRUE(entry->screenshot().get());
 
     entry = NavigationEntryImpl::FromNavigationEntry(
         web_contents->GetController().GetActiveEntry());
     EXPECT_FALSE(entry->screenshot().get());
   }
 }
 
 }  // namespace content