Merge from vscode 4f85c3c94c15457e1d4c9e67da6800630394ea54 (#8757)

* Merge from vscode 4f85c3c94c15457e1d4c9e67da6800630394ea54

* disable failing tests

src/vs/vscode.proposed.d.ts

@@ -1474,4 +1474,40 @@ declare module 'vscode' {
 	}
 
 	//#endregion
+
+	//#region color theme access
+
+	/**
+	 * Represents a color theme kind.
+	 */
+	export enum ColorThemeKind {
+		Light = 1,
+		Dark = 2,
+		HighContrast = 3
+	}
+
+	/**
+	 * Represents a color theme.
+	 */
+	export interface ColorTheme {
+
+		/**
+		 * The kind of this color theme: light, dark or high contrast.
+		 */
+		readonly kind: ColorThemeKind;
+	}
+
+	export namespace window {
+		/**
+		 * The currently active color theme as configured in the settings. The active
+		 * theme can be changed via the `workbench.colorTheme` setting.
+		 */
+		export let activeColorTheme: ColorTheme;
+
+		/**
+		 * An [event](#Event) which fires when the active theme changes or one of it's colors chnage.
+		 */
+		export const onDidChangeActiveColorTheme: Event<ColorTheme>;
+	}
+
 }