[DevTools] Migrate input domain to new generator.

content/browser/devtools/protocol_config.json

 {
     "use_snake_file_names": true,
     "use_title_case_methods": true,
 
     "protocol": {
         "package": "content/browser/devtools/protocol",
         "output": "protocol",
         "namespace": ["content", "protocol"],
         "export_macro": "CONTENT_EXPORT",
         "export_header": "content/common/content_export.h",
         "options": [
             {
                 "domain": "DOM",
                 "include": ["setFileInputFiles"],
                 "include_events": [],
                 "include_types": ["NodeId", "RGBA"]
             },
             {
                 "domain": "Emulation",
                 "include": ["setGeolocationOverride", "clearGeolocationOverride", "setTouchEmulationEnabled", "canEmulate", "setDeviceMetricsOverride", "clearDeviceMetricsOverride", "setVisibleSize"]
             },
             {
+                "domain": "Input",
+                "exclude": ["dispatchTouchEvent"],
+                "async": ["synthesizePinchGesture", "synthesizeScrollGesture", "synthesizeTapGesture"]
+            },
+            {
                 "domain": "Inspector"
             },
             {
                 "domain": "IO",
                 "async": ["read"]
             },
             {
                 "domain": "Memory",
                 "include": ["setPressureNotificationsSuppressed", "simulatePressureNotification"]
             },
@@ skipping 43 matching lines @@
     },
 
     "lib": {
         "package": "content/browser/devtools/protocol",
         "output": "protocol",
         "string_header": "content/browser/devtools/protocol_string.h",
         "export_macro": "CONTENT_EXPORT",
         "export_header": "content/common/content_export.h"
     }
 }