[DevTools] Use inspector_protocol generator in content/browser/devtools.

content/browser/devtools/protocol_config.json

Index: content/browser/devtools/protocol_config.json
diff --git a/content/browser/devtools/protocol_config.json b/content/browser/devtools/protocol_config.json
new file mode 100644
index 0000000000000000000000000000000000000000..ee65769bda250b3157fe7256a071c148a43b3982
--- /dev/null
+++ b/content/browser/devtools/protocol_config.json
@@ -0,0 +1,26 @@
+{
+    "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": "Tracing",
+                "async": ["start", "end"]
+            }
+        ]
+    },
+
+    "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"
+    }
+}