Add frameId to executeScript/insertCSS

extensions/common/api/extension_types.json

Index: extensions/common/api/extension_types.json
diff --git a/extensions/common/api/extension_types.json b/extensions/common/api/extension_types.json
index 3efc2f23ae3e455cd3b5a724a85b7d0c794f95d9..88c04a96da84f95b3fb94cd2dd46841e3bdde92b 100644
--- a/extensions/common/api/extension_types.json
+++ b/extensions/common/api/extension_types.json
@@ -34,7 +34,17 @@
         "properties": {
           "code": {"type": "string", "optional": true, "description": "JavaScript or CSS code to inject.<br><br><b>Warning:</b><br>Be careful using the <code>code</code> parameter. Incorrect use of it may open your extension to <a href=\"https://en.wikipedia.org/wiki/Cross-site_scripting\">cross site scripting</a> attacks."},
           "file": {"type": "string", "optional": true, "description": "JavaScript or CSS file to inject."},
-          "allFrames": {"type": "boolean", "optional": true, "description": "If allFrames is <code>true</code>, implies that the JavaScript or CSS should be injected into all frames of current page. By default, it's <code>false</code> and is only injected into the top frame."},
+          "allFrames": {
+            "type": "boolean",
+            "optional": true,
+            "description": "If allFrames is <code>true</code>, implies that the JavaScript or CSS should be injected into all frames of current page. By default, it's <code>false</code> and is only injected into the top frame. If <code>true</code> and <code>frameId</code> is set, then the code is inserted in the selected frame and all of its child frames."
+          },
+          "frameId": {
+            "type": "integer",
+            "optional": true,
+            "minimum": 0,
+            "description": "The <a href='webNavigation#frame_ids'>frame</a> where the script or CSS should be injected."
+          },
           "matchAboutBlank": {"type": "boolean", "optional": true, "description": "If matchAboutBlank is true, then the code is also injected in about:blank and about:srcdoc frames if your extension has access to its parent document. Code cannot be inserted in top-level about:-frames. By default it is <code>false</code>."},
           "runAt": {
             "type": "string",