Delete layout_viewport_size.

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 270e8eb92287f605b377542127f660f1deec037a..815cc4a08c16b25ae6ccc02d674747596b5e4d81 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -176,11 +176,9 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
   void SetDebugState(const LayerTreeDebugState& debug_state);
   const LayerTreeDebugState& debug_state() const { return debug_state_; }
 
-  void SetViewportSize(gfx::Size layout_viewport_size,
-                       gfx::Size device_viewport_size);
+  void SetViewportSize(gfx::Size device_viewport_size);
   void SetOverdrawBottomHeight(float overdraw_bottom_height);
 
-  gfx::Size layout_viewport_size() const { return layout_viewport_size_; }
   gfx::Size device_viewport_size() const { return device_viewport_size_; }
   float overdraw_bottom_height() const { return overdraw_bottom_height_; }
 
@@ -301,7 +299,6 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
   LayerTreeSettings settings_;
   LayerTreeDebugState debug_state_;
 
-  gfx::Size layout_viewport_size_;
   gfx::Size device_viewport_size_;
   float overdraw_bottom_height_;
   float device_scale_factor_;