gesture nav: Disable for M28.

content/browser/web_contents/web_contents_screenshot_manager.cc

 // Copyright (c) 2013 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_screenshot_manager.h"
 
 #include "base/command_line.h"
 #include "base/threading/worker_pool.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/navigation_controller_impl.h"
@@ skipping 53 matching lines @@
     : owner_(owner),
       screenshot_factory_(this),
       min_screenshot_interval_ms_(kMinScreenshotIntervalMS) {
 }
 
 WebContentsScreenshotManager::~WebContentsScreenshotManager() {
 }
 
 void WebContentsScreenshotManager::TakeScreenshot() {
   static bool overscroll_enabled = CommandLine::ForCurrentProcess()->
-      GetSwitchValueASCII(switches::kOverscrollHistoryNavigation) != "0";
+      GetSwitchValueASCII(switches::kOverscrollHistoryNavigation) == "1";
   if (!overscroll_enabled)
     return;
 
   NavigationEntryImpl* entry =
       NavigationEntryImpl::FromNavigationEntry(owner_->GetLastCommittedEntry());
   if (!entry)
     return;
 
   RenderViewHost* render_view_host =
       owner_->web_contents()->GetRenderViewHost();
@@ skipping 178 matching lines @@
         owner_->GetEntryAtIndex(forward));
     if (ClearScreenshot(entry))
       --screenshot_count;
     ++forward;
   }
   CHECK_GE(screenshot_count, 0);
   CHECK_LE(screenshot_count, kMaxScreenshots);
 }
 
 }  // namespace content