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

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index ed4dc615fe406f2b4f6501252e78da729ac9ba42..3bdc4fd36fd2b0c282e6220af03378bd1aaa90c1 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -92,7 +92,8 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
       bool is_same_page,
       const base::TimeTicks& navigation_start,
       int pending_nav_entry_id,
-      bool started_from_context_menu);
+      bool started_from_context_menu,
+      bool should_bypass_main_world_csp);
   ~NavigationHandleImpl() override;
 
   // NavigationHandle implementation:
@@ -328,6 +329,10 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
     response_headers_ = response_headers;
   }
 
+  bool should_bypass_main_world_csp() const {
+    return should_bypass_main_world_csp_;
+  }
+
  private:
   friend class NavigationHandleImplTest;
 
@@ -353,7 +358,8 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
                        bool is_same_page,
                        const base::TimeTicks& navigation_start,
                        int pending_nav_entry_id,
-                       bool started_from_context_menu);
+                       bool started_from_context_menu,
+                       bool should_bypass_main_world_csp);
 
   NavigationThrottle::ThrottleCheckResult CheckWillStartRequest();
   NavigationThrottle::ThrottleCheckResult CheckWillRedirectRequest();
@@ -500,6 +506,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   net::HostPortPair socket_address_;
   NavigationType navigation_type_;
 
+  // Whether or not the navigation has been issued by an isolated world, for
+  // instance from a chrome extension. When true, the navigation should not be
+  // blocked by the parent frame's CSP.
+  bool should_bypass_main_world_csp_;
+
   base::WeakPtrFactory<NavigationHandleImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);