Add DevTools method for cross-process memory notification suppressing

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 38 matching lines @@
         "domain": "Memory",
         "hidden": true,
         "commands": [
             {
                 "name": "getDOMCounters",
                 "returns": [
                     { "name": "documents", "type": "integer" },
                     { "name": "nodes", "type": "integer" },
                     { "name": "jsEventListeners", "type": "integer" }
                 ]
+            },
+            {
+                "name": "setNotificationsSuppressed",

[Sami, 2015/09/08 17:43:28]

nit: "Notifications" sounds a little too general. How about going full Java with
setPressureNotificationsSuppressed? (could even throw in the word memory in
there, but not required).

[petrcermak, 2015/09/14 12:46:03]

Done.

+                "description": "Enable/disable suppressing memory pressure notifications in all processes.",
+                "parameters": [
+                    { "name": "suppressed", "type": "boolean", "description": "If true, memory pressure notifications will be suppressed."}
+                ],
+                "handlers": ["browser"]
             }
         ]
     },
     {
         "domain": "Page",
         "description": "Actions and events related to the inspected page belong to the page domain.",
         "types": [
             {
                 "id": "ResourceType",
                 "type": "string",
@@ skipping 5175 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
             }
         ]
     }]
 }