Plumb pinch virtual viewport flag to CC.

cc/base/switches.h

 // 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.
 
 // Defines all the "cc" command-line switches.
 
 #ifndef CC_BASE_SWITCHES_H_
 #define CC_BASE_SWITCHES_H_
 
 #include "cc/base/cc_export.h"
@@ skipping 17 matching lines @@
 CC_EXPORT extern const char kNumRasterThreads[];
 CC_EXPORT extern const char kTopControlsHeight[];
 CC_EXPORT extern const char kTopControlsHideThreshold[];
 CC_EXPORT extern const char kTraceOverdraw[];
 CC_EXPORT extern const char kTopControlsShowThreshold[];
 CC_EXPORT extern const char kSlowDownRasterScaleFactor[];
 CC_EXPORT extern const char kLowResolutionContentsScaleFactor[];
 CC_EXPORT extern const char kCompositeToMailbox[];
 CC_EXPORT extern const char kMaxTilesForInterestArea[];
 CC_EXPORT extern const char kMaxUnusedResourceMemoryUsagePercentage[];
+CC_EXPORT extern const char kEnablePinchVirtualViewport[];
 CC_EXPORT extern const char kEnablePartialSwap[];
 CC_EXPORT extern const char kStrictLayerPropertyChangeChecking[];
 
 // Switches for both the renderer and ui compositors.
 CC_EXPORT extern const char kUIDisablePartialSwap[];
 CC_EXPORT extern const char kEnablePerTilePainting[];
 CC_EXPORT extern const char kUIEnablePerTilePainting[];
 
 // Debug visualizations.
 CC_EXPORT extern const char kShowCompositedLayerBorders[];
@@ skipping 18 matching lines @@
 // Unit test related.
 CC_EXPORT extern const char kCCLayerTreeTestNoTimeout[];
 CC_EXPORT extern const char kCCUnittestsTraceEventsToVLOG[];
 
 CC_EXPORT bool IsImplSidePaintingEnabled();
 
 }  // namespace switches
 }  // namespace cc
 
 #endif  // CC_BASE_SWITCHES_H_