Revert of PlzNavigate: Enforce 'frame-src' CSP on the browser.

third_party/WebKit/public/web/WebLocalFrame.h

Index: third_party/WebKit/public/web/WebLocalFrame.h
diff --git a/third_party/WebKit/public/web/WebLocalFrame.h b/third_party/WebKit/public/web/WebLocalFrame.h
index b08829ac935d9dbe76688588fff727810679bf75..23bd2401edbd05c5f0ee3e14304287579ce5add6 100644
--- a/third_party/WebKit/public/web/WebLocalFrame.h
+++ b/third_party/WebKit/public/web/WebLocalFrame.h
@@ -37,7 +37,6 @@
 enum class WebSandboxFlags;
 enum class WebTreeScopeType;
 struct WebConsoleMessage;
-struct WebContentSecurityPolicyViolation;
 struct WebFindOptions;
 struct WebFloatRect;
 struct WebPrintPresetOptions;
@@ -155,11 +154,6 @@
   // and stop this frame loading.
   virtual bool maybeRenderFallbackContent(const WebURLError&) const = 0;
 
-  // Called when a navigation is blocked because a Content Security Policy (CSP)
-  // is infringed.
-  virtual void reportContentSecurityPolicyViolation(
-      const blink::WebContentSecurityPolicyViolation&) = 0;
-
   // Navigation State -------------------------------------------------------
 
   // Returns true if the current frame's load event has not completed.