PROTOTYPE: PlzNavigate: use a Mojo data pipe to stream navigation data to the renderer.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 243066beaae50e2b93bb9929f5fa57437d74da21..cfe18ae534db83470b8168349fce394a03475d11 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -51,6 +51,8 @@
 #include "third_party/WebKit/public/web/WebScriptExecutionCallback.h"
 #include "ui/gfx/range/range.h"
 #include "url/gurl.h"
+#include "content/public/common/resource_response.h"
+#include "content/common/navigation_params.h"
 
 #if defined(ENABLE_PLUGINS)
 #include "content/renderer/pepper/plugin_power_saver_helper.h"
@@ -140,15 +142,13 @@ class RenderWidgetFullscreenPepper;
 class ScreenOrientationDispatcher;
 class UserMediaClientImpl;
 class WakeLockDispatcher;
-struct CommonNavigationParams;
 struct CustomContextMenuContext;
 struct FrameReplicationState;
 struct NavigationParams;
-struct RequestNavigationParams;
-struct ResourceResponseHead;
 struct StartNavigationParams;
 struct StreamOverrideParameters;
 class VRDispatcher;
+class RenderThreadImpl;
 
 class CONTENT_EXPORT RenderFrameImpl
     : public RenderFrame,
@@ -655,6 +655,9 @@ class CONTENT_EXPORT RenderFrameImpl
   // is exposed on a global "mojo" object rather than "define".
   void EnableMojoBindings(bool for_layout_tests);
 
+  void ReceiveNavigationDataPipeConsumerHandle(
+      mojo::ScopedDataPipeConsumerHandle data_consumer_handle, int32_t handle_commit_id);
+
  protected:
   explicit RenderFrameImpl(const CreateParams& params);
 
@@ -786,7 +789,8 @@ class CONTENT_EXPORT RenderFrameImpl
   void OnCommitNavigation(const ResourceResponseHead& response,
                           const GURL& stream_url,
                           const CommonNavigationParams& common_params,
-                          const RequestNavigationParams& request_params);
+                          const RequestNavigationParams& request_params,
+                          int32_t navigation_commit_id);
   void OnFailedNavigation(const CommonNavigationParams& common_params,
                           const RequestNavigationParams& request_params,
                           bool has_stale_copy_in_cache,
@@ -810,6 +814,8 @@ class CONTENT_EXPORT RenderFrameImpl
   void OnCopyToFindPboard();
 #endif
 
+  void NavigateIfIPCSynched(bool no_sync_needed);
+
   // Requests that the browser process navigates to |url|. If
   // |is_history_navigation_in_new_child| is true, the browser process should
   // look for a matching FrameNavigationEntry in the last committed entry to use
@@ -1196,6 +1202,17 @@ class CONTENT_EXPORT RenderFrameImpl
   // Whether or not this RenderFrame is currently pasting.
   bool is_pasting_;
 
+  // TODO: this should all be moved into a struct that holds "ongoing navigation commit data"
+  mojo::ScopedDataPipeConsumerHandle latest_handle_;
+  int32_t latest_handle_commit_id_;
+  RenderThreadImpl* handle_render_thread_;
+  int32_t latest_navigation_commit_id_;
+  RenderThreadImpl* navigation_render_thread_;
+  ResourceResponseHead navigation_response;
+  GURL navigation_stream_url;
+  CommonNavigationParams navigation_common_params;
+  RequestNavigationParams navigation_request_params;
+
 #if defined(ENABLE_WEBVR)
   // The VR dispatcher attached to the frame, lazily initialized.
   scoped_ptr<VRDispatcher> vr_dispatcher_;