DevTools: Introduce Page.getManifest remote debugging protocol method.

third_party/WebKit/Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 125 matching lines @@
                 "properties": [
                   { "name": "id", "type": "integer", "description": "Unique id of the navigation history entry." },
                   { "name": "url", "type": "string", "description": "URL of the navigation history entry." },
                   { "name": "title", "type": "string", "description": "Title of the navigation history entry." }
                 ],
                 "hidden": true
             },
             {
                 "id": "ScreencastFrameMetadata",
                 "type": "object",
-                "description": "Screencast frame metadata",
+                "description": "Screencast frame metadata.",
                 "properties": [
                     { "name": "offsetTop", "type": "number", "hidden": true, "description": "Top offset in DIP." },
                     { "name": "pageScaleFactor", "type": "number", "hidden": true, "description": "Page scale factor." },
                     { "name": "deviceWidth", "type": "number", "hidden": true, "description": "Device screen width in DIP." },
                     { "name": "deviceHeight", "type": "number", "hidden": true, "description": "Device screen height in DIP." },
                     { "name": "scrollOffsetX", "type": "number", "hidden": true, "description": "Position of horizontal scroll in CSS pixels." },
                     { "name": "scrollOffsetY", "type": "number", "hidden": true, "description": "Position of vertical scroll in CSS pixels." },
                     { "name": "timestamp", "type": "number", "optional": true, "hidden": true, "description": "Frame swap timestamp." }
                 ],
                 "hidden": true
             },
             {
                 "id": "DialogType",
-                "description": "Javascript dialog type",
+                "description": "Javascript dialog type.",
                 "type": "string",
                 "enum": ["alert", "confirm", "prompt", "beforeunload"],
                 "hidden": true
+            },
+            {
+                "id": "AppManifestError",
+                "description": "Error while paring app manifest.",
+                "type": "object",
+                "properties": [
+                  { "name": "message", "type": "string", "description": "Error message." },
+                  { "name": "critical", "type": "integer", "description": "If criticial, this is a non-recoverable parse error." },
+                  { "name": "line", "type": "integer", "description": "Error line." },
+                  { "name": "column", "type": "integer", "description": "Error column." }
+                ],
+                "hidden": true
             }
         ],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables page domain notifications.",
                 "handlers": ["browser", "renderer"]
             },
             {
                 "name": "disable",
@@ skipping 267 matching lines @@
             },
             {
                 "name": "setOverlayMessage",
                 "parameters": [
                     { "name": "message", "type": "string", "optional": true, "description": "Overlay message to display when paused in debugger." }
                 ],
                 "hidden": true,
                 "description": "Sets overlay message."
             },
             {
+                "name": "getAppManifest",
+                "hidden": true,
+                "returns": [
+                    { "name": "data", "type": "string", "optional": true, "description": "Manifest content." },
+                    { "name": "errors", "type": "array", "items": { "$ref": "AppManifestError" } }
+                ],
+                "handlers": ["none"]
+            },
+            {
                 "name": "requestAppBanner",
                 "hidden": true,
                 "handlers": ["browser"]
             }
         ],
         "events": [
             {
                 "name": "domContentEventFired",
                 "parameters": [
                     { "name": "timestamp", "type": "number" }
@@ skipping 4627 matching lines @@
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$ref": "AXNode", "description": "The <code>Accessibility.AXNode</code> for this DOM node, if it exists.", "optional": true }
                 ],
                 "description": "Fetches the accessibility node for this DOM node, if it exists.",
                 "hidden": true
             }
         ]
     }]
 }