PlzNavigate: Do not send synchronous navigations from the renderer to the browser.

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index 86e5e06917fd0946b456f2b467a3790cfe58c223..b0b3d3f21eb10446380d4c3f20ce1bf750634dab 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -22,6 +22,12 @@ class RefCountedMemory;
 
 namespace content {
 
+// PlzNavigate
+// Helper function to determine if the navigation to |url| should make a request
+// to the network stack. A request should not be sent for data URLs, JavaScript
+// URLs or about:blank. In these cases, no request needs to be sent.
+bool ShouldMakeNetworkRequestForURL(const GURL& url);
+
 // The following structures hold parameters used during a navigation. In
 // particular they are used by FrameMsg_Navigate, FrameMsg_CommitNavigation and
 // FrameHostMsg_BeginNavigation.