Add ActionRunner wrapper for the remaining less used actions (try 2):

tools/telemetry/telemetry/page/actions/pinch.js

Index: tools/telemetry/telemetry/page/actions/pinch.js
diff --git a/tools/telemetry/telemetry/page/actions/pinch.js b/tools/telemetry/telemetry/page/actions/pinch.js
index 6e3e6017088005139ca9fe171e92997930c592b5..bdada3aa154695e306a269ebb5f086323d892584 100644
--- a/tools/telemetry/telemetry/page/actions/pinch.js
+++ b/tools/telemetry/telemetry/page/actions/pinch.js
@@ -13,14 +13,14 @@
   function PinchGestureOptions(opt_options) {
     if (opt_options) {
       this.element_ = opt_options.element;
-      this.left_anchor_percentage_ = opt_options.left_anchor_percentage;
-      this.top_anchor_percentage_ = opt_options.top_anchor_percentage;
+      this.left_anchor_ratio_ = opt_options.left_anchor_ratio;
+      this.top_anchor_ratio_ = opt_options.top_anchor_ratio;
       this.scale_factor_ = opt_options.scale_factor;
       this.speed_ = opt_options.speed;
     } else {
       this.element_ = document.body;
-      this.left_anchor_percentage_ = 0.5;
-      this.top_anchor_percentage_ = 0.5;
+      this.left_anchor_ratio_ = 0.5;
+      this.top_anchor_ratio_ = 0.5;
       this.scale_factor_ = 2.0;
       this.speed_ = 800;
     }
@@ -54,9 +54,9 @@
 
     var rect = __GestureCommon_GetBoundingVisibleRect(this.options_.element_);
     var anchor_left =
-        rect.left + rect.width * this.options_.left_anchor_percentage_;
+        rect.left + rect.width * this.options_.left_anchor_ratio_;
     var anchor_top =
-        rect.top + rect.height * this.options_.top_anchor_percentage_;
+        rect.top + rect.height * this.options_.top_anchor_ratio_;
     chrome.gpuBenchmarking.pinchBy(this.options_.scale_factor_,
                                    anchor_left, anchor_top,
                                    this.onGestureComplete_.bind(this),