Override DevTools security summary when a Safe Browsing warning shows.

third_party/WebKit/Source/core/inspector/browser_protocol.json

Index: third_party/WebKit/Source/core/inspector/browser_protocol.json
diff --git a/third_party/WebKit/Source/core/inspector/browser_protocol.json b/third_party/WebKit/Source/core/inspector/browser_protocol.json
index a8cbec4201fed4424a8e3fc403f5601373bc9e6a..8c02d78c3780558feed84f98051937a7f1431215 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -905,9 +905,10 @@
                 "description": "The security state of the page changed.",
                 "parameters": [
                     { "name": "securityState", "$ref": "SecurityState", "description": "Security state." },
-                    { "name": "explanations", "type": "array", "items": { "$ref": "SecurityStateExplanation" }, "description": "List of explanations for the security state. If the overall security state is `insecure` or `warning`, at least one corresponding explanation should be included.", "optional": true },
-                    { "name": "insecureContentStatus", "$ref": "InsecureContentStatus", "description": "Information about insecure content on the page.", "optional": true },
-                    { "name": "schemeIsCryptographic", "type": "boolean", "description": "True if the page was loaded over cryptographic transport such as HTTPS.", "optional": true }
+                    { "name": "schemeIsCryptographic", "type": "boolean", "description": "True if the page was loaded over cryptographic transport such as HTTPS." },
+                    { "name": "explanations", "type": "array", "items": { "$ref": "SecurityStateExplanation" }, "description": "List of explanations for the security state. If the overall security state is `insecure` or `warning`, at least one corresponding explanation should be included." },
+                    { "name": "insecureContentStatus", "$ref": "InsecureContentStatus", "description": "Information about insecure content on the page." },
+                    { "name": "summary", "type": "string", "description": "Overrides user-visible description of the state.", "optional": true }
                 ]
             }
         ]