Generate ComputedStyle::SetZoom.

The return value is useless, so might as well use the generated function.

R=futhark@chromium.org

Bug: 807503
Change-Id: I402edb2b2a70e5ec14e06c3be0fcf5836b46c083
Reviewed-on: https://chromium-review.googlesource.com/1057710Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Commit-Queue: Anders Ruud <andruud@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558684}

third_party/blink/renderer/core/css/CSSProperties.json5

@@ -741,7 +741,6 @@
       field_template: "primitive",
       default_value: "1.0",
       type_name: "float",
-      computed_style_custom_functions: ["setter"],
       custom_apply_functions_all: true,
       priority: "High",
     },

third_party/blink/renderer/core/style/computed_style.h

@@ -795,8 +795,6 @@ class ComputedStyle : public ComputedStyleBase,
     SetZIndexInternal(0);
   }
 
-  // zoom
-  bool SetZoom(float);
   bool SetEffectiveZoom(float);
 
   // -webkit-clip-path
@@ -2543,13 +2541,6 @@ class ComputedStyle : public ComputedStyleBase,
       UpdatePropertySpecificDifferencesCompositingReasonsUsedStylePreserve3D);
 };
 
-inline bool ComputedStyle::SetZoom(float f) {
-  if (Zoom() == f)
-    return false;
-  SetZoomInternal(f);
-  return true;
-}
-
 inline bool ComputedStyle::SetEffectiveZoom(float f) {
   // Clamp the effective zoom value to a smaller (but hopeful still large
   // enough) range, to avoid overflow in derived computations.