Move SecurityStyleChanged logic and tests to chrome/browser/ssl

chrome/browser/ssl/chrome_security_state_model_client.h

Index: chrome/browser/ssl/chrome_security_state_model_client.h
diff --git a/chrome/browser/ssl/chrome_security_state_model_client.h b/chrome/browser/ssl/chrome_security_state_model_client.h
index 4ea52792f4d8453016f2b4002a97514b3044206f..af628bcc7e765dcb6eb81d10fea1b65cb4f725da 100644
--- a/chrome/browser/ssl/chrome_security_state_model_client.h
+++ b/chrome/browser/ssl/chrome_security_state_model_client.h
@@ -11,8 +11,10 @@
 #include "components/security_state/security_state_model.h"
 #include "components/security_state/security_state_model_client.h"
 #include "content/public/browser/web_contents_user_data.h"
+#include "content/public/common/security_style.h"
 
 namespace content {
+struct SecurityStyleExplanations;
 class WebContents;
 }  // namespace content
 
@@ -27,6 +29,13 @@ class ChromeSecurityStateModelClient
   const security_state::SecurityStateModel::SecurityInfo& GetSecurityInfo()
       const;
 
+  // Returns the SecurityStyle that should be applied to the given
+  // |web_contents|. Populates |security_style_explanations| to explain
+  // why the returned SecurityStyle was chosen.
+  content::SecurityStyle GetSecurityStyle(
+      content::WebContents* web_contents,
+      content::SecurityStyleExplanations* security_style_explanations);
+
   // SecurityStateModelClient:
   void GetVisibleSecurityState(
       security_state::SecurityStateModel::VisibleSecurityState* state) override;