DevTools: Modify shadow-editor canvas colors to work better with dark theme

third_party/WebKit/Source/devtools/front_end/ui/CSSShadowEditor.js

Index: third_party/WebKit/Source/devtools/front_end/ui/CSSShadowEditor.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/CSSShadowEditor.js b/third_party/WebKit/Source/devtools/front_end/ui/CSSShadowEditor.js
index b36bc405f6adb02d4fb7829907dbdbedc6bc7fb4..2cbbb0f63a51ae777e26bc734244bf0394b743fb 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/CSSShadowEditor.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/CSSShadowEditor.js
@@ -139,7 +139,7 @@ WebInspector.CSSShadowEditor.prototype = {
         // Draw dashed axes.
         context.save();
         context.setLineDash([1, 1]);
-        context.strokeStyle = "rgba(0, 0, 0, 0.2)";
+        context.strokeStyle = "rgba(210, 210, 210, 0.8)";
         context.beginPath();
         context.moveTo(this._halfCanvasSize, 0);
         context.lineTo(this._halfCanvasSize, WebInspector.CSSShadowEditor.canvasSize);
@@ -153,7 +153,7 @@ WebInspector.CSSShadowEditor.prototype = {
         context.save();
         context.translate(this._halfCanvasSize, this._halfCanvasSize);
         context.lineWidth = 2;
-        context.strokeStyle = "rgba(0, 0, 0, 0.3)";
+        context.strokeStyle = "rgba(130, 130, 130, 0.75)";
         context.beginPath();
         context.moveTo(0, 0);
         context.lineTo(thumbPoint.x, thumbPoint.y);