Implement hidpi and pinch-zoom scaling of filter params in cc.

cc/quads/render_pass_draw_quad.cc

Index: cc/quads/render_pass_draw_quad.cc
diff --git a/cc/quads/render_pass_draw_quad.cc b/cc/quads/render_pass_draw_quad.cc
index 81b0da285e5ae221e9b03ff798abb7dae61421fa..6fda7d1577ab5caf8289a6a31d1a09796204c4d7 100644
--- a/cc/quads/render_pass_draw_quad.cc
+++ b/cc/quads/render_pass_draw_quad.cc
@@ -44,16 +44,26 @@ void RenderPassDrawQuad::SetNew(
     const gfx::Rect& contents_changed_since_last_frame,
     const gfx::RectF& mask_uv_rect,
     const FilterOperations& filters,
-    const FilterOperations& background_filters) {
+    const FilterOperations& background_filters,
+    const gfx::Vector2dF& scale) {
   DCHECK_GT(render_pass_id.layer_id, 0);
   DCHECK_GE(render_pass_id.index, 0);
 
   gfx::Rect opaque_rect;
   bool needs_blending = false;
-  SetAll(shared_quad_state, rect, opaque_rect, visible_rect, needs_blending,
-         render_pass_id, is_replica, mask_resource_id,
-         contents_changed_since_last_frame, mask_uv_rect, filters,
-         background_filters);
+  SetAll(shared_quad_state,
+         rect,
+         opaque_rect,
+         visible_rect,
+         needs_blending,
+         render_pass_id,
+         is_replica,
+         mask_resource_id,
+         contents_changed_since_last_frame,
+         mask_uv_rect,
+         filters,
+         background_filters,
+         scale);
 }
 
 void RenderPassDrawQuad::SetAll(
@@ -68,7 +78,8 @@ void RenderPassDrawQuad::SetAll(
     const gfx::Rect& contents_changed_since_last_frame,
     const gfx::RectF& mask_uv_rect,
     const FilterOperations& filters,
-    const FilterOperations& background_filters) {
+    const FilterOperations& background_filters,
+    const gfx::Vector2dF& scale) {
   DCHECK_GT(render_pass_id.layer_id, 0);
   DCHECK_GE(render_pass_id.index, 0);
 
@@ -81,6 +92,7 @@ void RenderPassDrawQuad::SetAll(
   this->mask_uv_rect = mask_uv_rect;
   this->filters = filters;
   this->background_filters = background_filters;
+  this->scale = scale;
 }
 
 void RenderPassDrawQuad::IterateResources(