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 31919e7d86acd39f19a9f51d9be18175eac62761..198d6c0dac541ab6a6c47afd1fbffa4da29cdee2 100644
--- a/third_party/WebKit/public/web/WebLocalFrame.h
+++ b/third_party/WebKit/public/web/WebLocalFrame.h
@@ -35,6 +35,7 @@ enum class WebCachePolicy;
 enum class WebSandboxFlags;
 enum class WebTreeScopeType;
 struct WebConsoleMessage;
+struct WebContentSecurityPolicyViolation;
 struct WebFindOptions;
 struct WebFloatRect;
 struct WebPrintPresetOptions;
@@ -152,6 +153,11 @@ class WebLocalFrame : public WebFrame {
   // 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 contentSecurityPolicyViolation(
+      const blink::WebContentSecurityPolicyViolation&) = 0;
+
   // Navigation State -------------------------------------------------------
 
   // Returns true if the current frame's load event has not completed.