Added the command line flag that enables CSS Shaders: "--enable-css-custom-filter".

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 224 matching lines @@
 
 // Enable deferred 2d canvas rendering.
 const char kEnableDeferred2dCanvas[]        = "enable-deferred-2d-canvas";
 
 // Enables compositing to texture instead of display.
 const char kEnableCompositeToTexture[]      = "enable-composite-to-texture";
 
 // Enables CSS3 regions
 const char kEnableCssRegions[]              = "enable-css-regions";
 
+// Enables CSS3 custom filters
+const char kEnableCssShaders[]              = "enable-css-shaders";
+
 // Enables device motion events.
 const char kEnableDeviceMotion[]            = "enable-device-motion";
 
 // Enables the fastback page cache.
 const char kEnableFastback[]                = "enable-fastback";
 
 // By default, a page is laid out to fill the entire width of the window.
 // This flag fixes the layout of the page to a default of 980 CSS pixels,
 // or to a specified width and height using --enable-fixed-layout=w,h
 const char kEnableFixedLayout[]             = "enable-fixed-layout";
@@ skipping 403 matching lines @@
 extern const char kFlingTapSuppressMaxDown[] = "fling-tap-suppress-max-down";
 
 // Maximum time between mousedown and mouseup to be considered a tap.
 extern const char kFlingTapSuppressMaxGap[] = "fling-tap-suppress-max-gap";
 
 // Forces usage of the test compositor. Needed to run ui tests on bots.
 extern const char kTestCompositor[]         = "test-compositor";
 #endif
 
 }  // namespace switches