Inside of content, prefer SiteInstanceImpl to SiteInstance.

content/browser/frame_host/frame_tree.h

Index: content/browser/frame_host/frame_tree.h
diff --git a/content/browser/frame_host/frame_tree.h b/content/browser/frame_host/frame_tree.h
index 840228d412d4c4128a25a4b8742f93bc78c5f961..412bb2ca024fb31504fbb33ced0ba5a508cf463e 100644
--- a/content/browser/frame_host/frame_tree.h
+++ b/content/browser/frame_host/frame_tree.h
@@ -140,7 +140,7 @@ class CONTENT_EXPORT FrameTree {
   // for an opener's frame tree), in which case no nodes are skipped for
   // RenderFrameProxyHost creation.
   void CreateProxiesForSiteInstance(FrameTreeNode* source,
-                                    SiteInstance* site_instance);
+                                    SiteInstanceImpl* site_instance);
 
   // Convenience accessor for the main frame's RenderFrameHostImpl.
   RenderFrameHostImpl* GetMainFrame() const;
@@ -153,7 +153,7 @@ class CONTENT_EXPORT FrameTree {
   // other than |source|, those SiteInstances will be notified about the new
   // focused frame.   Note that |source| may differ from |node|'s current
   // SiteInstance (e.g., this happens for cross-process window.focus() calls).
-  void SetFocusedFrame(FrameTreeNode* node, SiteInstance* source);
+  void SetFocusedFrame(FrameTreeNode* node, SiteInstanceImpl* source);
 
   // Allows a client to listen for frame removal.  The listener should expect
   // to receive the RenderViewHostImpl containing the frame and the renderer-
@@ -164,7 +164,7 @@ class CONTENT_EXPORT FrameTree {
   // Creates a RenderViewHost for a new RenderFrameHost in the given
   // |site_instance|.  The RenderViewHost will have its Shutdown method called
   // when all of the RenderFrameHosts using it are deleted.
-  RenderViewHostImpl* CreateRenderViewHost(SiteInstance* site_instance,
+  RenderViewHostImpl* CreateRenderViewHost(SiteInstanceImpl* site_instance,
                                            int32_t routing_id,
                                            int32_t main_frame_routing_id,
                                            bool swapped_out,
@@ -173,7 +173,7 @@ class CONTENT_EXPORT FrameTree {
   // Returns the existing RenderViewHost for a new RenderFrameHost.
   // There should always be such a RenderViewHost, because the main frame
   // RenderFrameHost for each SiteInstance should be created before subframes.
-  RenderViewHostImpl* GetRenderViewHost(SiteInstance* site_instance);
+  RenderViewHostImpl* GetRenderViewHost(SiteInstanceImpl* site_instance);
 
   // Keeps track of which RenderFrameHosts and RenderFrameProxyHosts are using
   // each RenderViewHost.  When the number drops to zero, we call Shutdown on
@@ -205,7 +205,7 @@ class CONTENT_EXPORT FrameTree {
 
   // Updates page-level focus for this FrameTree in the subframe renderer
   // identified by |instance|.
-  void SetPageFocus(SiteInstance* instance, bool is_focused);
+  void SetPageFocus(SiteInstanceImpl* instance, bool is_focused);
 
  private:
   friend class FrameTreeTest;