Make it possible for the scroll offset delegate to intercept fling.

content/public/common/content_switches.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/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 527 matching lines @@
 // Causes the GPU process to display a dialog on launch.
 const char kGpuStartupDialog[]              = "gpu-startup-dialog";
 
 // Passes gpu vendor_id from browser process to GPU process.
 const char kGpuVendorID[]                   = "gpu-vendor-id";
 
 #if defined(OS_ANDROID)
 // Don't display any scrollbars. This is useful for Android WebView where
 // the system manages the scrollbars instead.
 const char kHideScrollbars[]                = "hide-scrollbars";
+
+// Don't process fling gestures targeted at the root scroll layer. This is
+// useful for the Android WebView which handles the fling animations itself.
+const char kIgnoreRootLayerFlings[]         = "ignore-root-layer-flings";
 #endif
 
 // These mappings only apply to the host resolver.
 const char kHostResolverRules[]             = "host-resolver-rules";
 
 // Ignores certificate-related errors.
 const char kIgnoreCertificateErrors[]       = "ignore-certificate-errors";
 
 // Ignores GPU blacklist.
 const char kIgnoreGpuBlacklist[]            = "ignore-gpu-blacklist";
@@ skipping 342 matching lines @@
 const char kEnableWebGLDraftExtensions[] = "enable-webgl-draft-extensions";
 
 // Enables/disables accelerated compositing for backgrounds of root layers with
 // background-attachment: fixed. Requires kForceCompositingMode.
 const char kDisableAcceleratedFixedRootBackground[] =
     "disable-accelerated-fixed-root-background";
 const char kEnableAcceleratedFixedRootBackground[] =
     "enable-accelerated-fixed-root-background";
 
 }  // namespace switches