Add back unseparated out version of method overloads in dart:html.

tools/dom/docs/docs.json

Index: tools/dom/docs/docs.json
diff --git a/tools/dom/docs/docs.json b/tools/dom/docs/docs.json
index 534156302d7ea1a74bb7dfb044212636edce6e7a..7494d1f5f5cf87d6d039a858c941be18c12eb51f 100644
--- a/tools/dom/docs/docs.json
+++ b/tools/dom/docs/docs.json
@@ -529,6 +529,50 @@
       }
     }
   },
+  "dart.dom.web_gl": {
+    "WebGLRenderingContext": {
+      "members": {
+        "bufferData": [
+          "/**",
+          "   * Buffers the specified data.",
+          "   *",
+          "   * This specific method is provided for WebGL API compatibility reasons, but",
+          "   * it is highly recommended that you use [bufferDataTyped] or [bufferByteData]",
+          "   * depending on your purposes.",
+          "   */"
+        ],
+        "bufferSubData": [
+          "/**",
+          "   * Buffers the specified subset of data.",
+          "   *",
+          "   * This specific method is provided for WebGL API compatibility reasons, but",
+          "   * it is highly recommended that you use [bufferSubDataTyped] or [bufferSubByteData]",
+          "   * depending on your purposes.",
+          "   */"
+        ],
+        "texImage2D": [
+          "/**",
+          "   * Updates the currently bound texture to [data].",
+          "   *",
+          "   * This specific method is provided for WebGL API compatibility reasons, but it",
+          "   * is highly recommended that you use [texImage2DUntyped] or [texImage2DTyped]",
+          "   * (or for more specificity, the more specialized [texImage2DImageData],",
+          "   * [texImage2DCanvas], [texImage2DVideo]).",
+          "   */"
+        ],
+        "texSubImage2D": [
+          "/**",
+          "   * Updates a sub-rectangle of the currently bound texture to [data].",
+          "   *",
+          "   * This specific method is provided for WebGL API compatibility reasons, but it",
+          "   * is highly recommended that you use [texSubImage2DUntyped] or [texSubImage2DTyped]",
+          "   * (or for more specificity, the more specialized [texSubImage2DImageData],",
+          "   * [texSubImage2DCanvas], [texSubImage2DVideo]).",
+          "   */"
+        ]
+      }
+    }
+  },
   "dart.dom.web_sql": {
     "Database": {
       "members": {