Enable Shape Detection Origin Trial

This change creates an Origin Trial for the Shape Detection API.

Intent to Experiment:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/eJnB-5Sg-mQ/uvdWnO2OBQAJ

Bug: 646035
Change-Id: Ib7b18f8544c0f9d7d4bb8730102800d63cc54c9f
Reviewed-on: https://chromium-review.googlesource.com/1159684Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580259}

third_party/blink/renderer/modules/shapedetection/barcode_detector.idl

@@ -9,7 +9,7 @@
     ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),
     MeasureAs=ShapeDetection_BarcodeDetectorConstructor,
-    RuntimeEnabled=ShapeDetection
+    OriginTrialEnabled=ShapeDetection
 ] interface BarcodeDetector {
     [CallWith=ScriptState] Promise<sequence<DetectedBarcode>> detect(ImageBitmapSource image);
 };

third_party/blink/renderer/modules/shapedetection/detected_barcode.idl

@@ -6,7 +6,7 @@
 
 [
     Constructor,
-    RuntimeEnabled=ShapeDetection
+    OriginTrialEnabled=ShapeDetection
 ] interface DetectedBarcode {
     // TODO(mcasas): Implement missing fields. https://crbug.com/646083
     [SameObject] readonly attribute DOMString rawValue;

third_party/blink/renderer/modules/shapedetection/detected_face.idl

@@ -6,7 +6,7 @@
 
 [
     Constructor,
-    RuntimeEnabled=ShapeDetection
+    OriginTrialEnabled=ShapeDetection
 ] interface DetectedFace {
     // TODO(xianglu): Implement any other fields. https://crbug.com/646083
     [SameObject] readonly attribute DOMRectReadOnly boundingBox;

third_party/blink/renderer/modules/shapedetection/detected_text.idl

@@ -6,7 +6,7 @@
 
 [
     Constructor,
-    RuntimeEnabled=ShapeDetection
+    OriginTrialEnabled=ShapeDetection
 ] interface DetectedText {
     [SameObject] readonly attribute DOMString rawValue;
     [SameObject] readonly attribute DOMRectReadOnly boundingBox;

third_party/blink/renderer/modules/shapedetection/face_detector.idl

@@ -9,7 +9,7 @@
     ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),
     MeasureAs=ShapeDetection_FaceDetectorConstructor,
-    RuntimeEnabled=ShapeDetection
+    OriginTrialEnabled=ShapeDetection
 ] interface FaceDetector {
     [CallWith=ScriptState] Promise<sequence<DetectedFace>> detect(ImageBitmapSource image);
 };

third_party/blink/renderer/modules/shapedetection/text_detector.idl

@@ -9,7 +9,7 @@
     ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),
     MeasureAs=ShapeDetection_TextDetectorConstructor,
-    RuntimeEnabled=ShapeDetection
+    OriginTrialEnabled=ShapeDetection
 ] interface TextDetector {
     [CallWith=ScriptState] Promise<sequence<DetectedText>> detect(ImageBitmapSource image);
 };

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1190,6 +1190,7 @@
     },
     {
       name: "ShapeDetection",
+      origin_trial_feature_name: "ShapeDetection",
       status: "experimental",
     },
     {