PlzNavigate: identify same-page browser-initiated navigation.

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index 19395064f60735c176a6bdf25b5a622ba416abb9..4a0c7cec73ffc4825e29fd96547d6e33faaef1c2 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -72,12 +72,13 @@ void UpdateLoadFlagsWithCacheFlags(
       *load_flags |=
           net::LOAD_ONLY_FROM_CACHE | net::LOAD_SKIP_CACHE_VALIDATION;
       break;
-    case FrameMsg_Navigate_Type::NORMAL:
+    case FrameMsg_Navigate_Type::SAME_DOCUMENT:
+    case FrameMsg_Navigate_Type::DIFFERENT_DOCUMENT:
+    case FrameMsg_Navigate_Type::HISTORY_SAME_DOCUMENT:
+    case FrameMsg_Navigate_Type::HISTORY_DIFFERENT_DOCUMENT:
       if (is_post)
         *load_flags |= net::LOAD_VALIDATE_CACHE;
       break;
-    default:
-      break;
   }
 }
 
@@ -231,8 +232,7 @@ std::unique_ptr<NavigationRequest> NavigationRequest::CreateBrowserInitiated(
                             blink::WebMixedContentContextType::Blockable,
                             initiator),
       entry.ConstructRequestNavigationParams(
-          frame_entry, is_same_document_history_load,
-          is_history_navigation_in_new_child,
+          frame_entry, is_history_navigation_in_new_child,
           entry.GetSubframeUniqueNames(frame_tree_node),
           frame_tree_node->has_committed_real_load(),
           controller->GetPendingEntryIndex() == -1,
@@ -252,34 +252,42 @@ std::unique_ptr<NavigationRequest> NavigationRequest::CreateRendererInitiated(
     const BeginNavigationParams& begin_params,
     int current_history_list_offset,
     int current_history_list_length) {
-  // TODO(clamy): Check if some PageState should be provided here.
+  // Only normal navigations to a different document or reloads are expected.
+  // - Renderer-initiated fragment-navigations never take place in the browser,
+  //   even with PlzNavigate.
+  // - Restore-navigations are always browser-initiated.
+  // - History-navigations use the browser-initiated path, event the ones that
+  //   are initiated by a javascript script, please see the IPC message
+  //   ViewHostMsg_GoToEntryAtOffset.
+  DCHECK(FrameMsg_Navigate_Type::IsReload(common_params.navigation_type) ||
+         common_params.navigation_type ==
+             FrameMsg_Navigate_Type::DIFFERENT_DOCUMENT);
+
   // TODO(clamy): See how we should handle override of the user agent when the
   // navigation may start in a renderer and commit in another one.
   // TODO(clamy): See if the navigation start time should be measured in the
   // renderer and sent to the browser instead of being measured here.
   // TODO(clamy): The pending history list offset should be properly set.
   RequestNavigationParams request_params(
-      false,                   // is_overriding_user_agent
-      std::vector<GURL>(),     // redirects
-      false,                   // can_load_local_resources
-      PageState(),             // page_state
-      0,                       // nav_entry_id
-      false,                   // is_same_document_history_load
-      false,                   // is_history_navigation_in_new_child
-      std::map<std::string, bool>(), // subframe_unique_names
+      false,                          // is_overriding_user_agent
+      std::vector<GURL>(),            // redirects
+      false,                          // can_load_local_resources
+      PageState(),                    // page_state
+      0,                              // nav_entry_id
+      false,                          // is_history_navigation_in_new_child
+      std::map<std::string, bool>(),  // subframe_unique_names
       frame_tree_node->has_committed_real_load(),
-      false,                   // intended_as_new_entry
-      -1,                      // pending_history_list_offset
+      false,  // intended_as_new_entry
+      -1,     // pending_history_list_offset
       current_history_list_offset, current_history_list_length,
-      false,                   // is_view_source
-      false,                   // should_clear_history_list
+      false,  // is_view_source
+      false,  // should_clear_history_list
       begin_params.has_user_gesture);
-  std::unique_ptr<NavigationRequest> navigation_request(
-      new NavigationRequest(frame_tree_node, common_params, begin_params,
-                            request_params,
-                            false, // browser_initiated
-                            false, // may_transfer
-                            nullptr, nullptr));
+  std::unique_ptr<NavigationRequest> navigation_request(new NavigationRequest(
+      frame_tree_node, common_params, begin_params, request_params,
+      false,  // browser_initiated
+      false,  // may_transfer
+      nullptr, nullptr));
   return navigation_request;
 }
 
@@ -346,7 +354,8 @@ void NavigationRequest::BeginNavigation() {
   state_ = STARTED;
   RenderFrameDevToolsAgentHost::OnBeforeNavigation(navigation_handle_.get());
 
-  if (ShouldMakeNetworkRequestForURL(common_params_.url)) {
+  if (ShouldMakeNetworkRequestForURL(common_params_.url) &&
+      !navigation_handle_->IsSamePage()) {
     // It's safe to use base::Unretained because this NavigationRequest owns
     // the NavigationHandle where the callback will be stored.
     // TODO(clamy): pass the real value for |is_external_protocol| if needed.
@@ -382,8 +391,6 @@ void NavigationRequest::BeginNavigation() {
 
 void NavigationRequest::CreateNavigationHandle(int pending_nav_entry_id) {
   DCHECK_EQ(frame_tree_node_->navigation_request(), this);
-  // TODO(nasko): Update the NavigationHandle creation to ensure that the
-  // proper values are specified for is_same_page.
   FrameTreeNode* frame_tree_node = frame_tree_node_;
 
   std::vector<GURL> redirect_chain;
@@ -393,11 +400,11 @@ void NavigationRequest::CreateNavigationHandle(int pending_nav_entry_id) {
 
   std::unique_ptr<NavigationHandleImpl> navigation_handle =
       NavigationHandleImpl::Create(
-        common_params_.url, redirect_chain, frame_tree_node_,
-        !browser_initiated_,
-        false,  // is_same_page
-        common_params_.navigation_start, pending_nav_entry_id,
-        false);  // started_in_context_menu
+          common_params_.url, redirect_chain, frame_tree_node_,
+          !browser_initiated_, FrameMsg_Navigate_Type::IsSameDocument(
+                                   common_params_.navigation_type),
+          common_params_.navigation_start, pending_nav_entry_id,
+          false);  // started_in_context_menu
 
   if (!frame_tree_node->navigation_request()) {
     // A callback could have cancelled this request synchronously in which case
@@ -723,7 +730,8 @@ void NavigationRequest::OnWillProcessResponseChecksComplete(
 }
 
 void NavigationRequest::CommitNavigation() {
-  DCHECK(response_ || !ShouldMakeNetworkRequestForURL(common_params_.url));
+  DCHECK(response_ || !ShouldMakeNetworkRequestForURL(common_params_.url) ||
+         navigation_handle_->IsSamePage());
   DCHECK(!common_params_.url.SchemeIs(url::kJavaScriptScheme));
 
   // Retrieve the RenderFrameHost that needs to commit the navigation.