Make <webview> use out-of-process iframe architecture.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 86e987fece752fcd7574d5407fff6dc17298f7b0..d7bac9a65b086ccabd99580ce53bca583e5a5af7 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -218,6 +218,9 @@ class CONTENT_EXPORT WebContentsImpl
   void ClearNavigationTransitionData();
 
   // WebContents ------------------------------------------------------
+  int AttachLocalFrameToGuest(WebContents* embedder_web_contents,

[Charlie Reis, 2015/04/30 23:06:47]

Move lower, as mentioned in web_contents.h.

[lazyboy, 2015/05/05 07:28:14]

Done.

+                              int embedder_frame_process_id,
+                              int embedder_frame_routing_id) override;
   WebContentsDelegate* GetDelegate() override;
   void SetDelegate(WebContentsDelegate* delegate) override;
   NavigationControllerImpl& GetController() override;
@@ -597,6 +600,7 @@ class CONTENT_EXPORT WebContentsImpl
   bool FocusLocationBarByDefault() override;
   void SetFocusToLocationBar(bool select_all) override;
   bool IsHidden() override;
+  int64 GetEmbedderFrameTreeNodeID() override;
 
   // NotificationObserver ------------------------------------------------------
 
@@ -732,6 +736,23 @@ class CONTENT_EXPORT WebContentsImpl
 
   class DestructionObserver;
 
+  // Used to create tree of WebContents.

[Charlie Reis, 2015/04/30 23:06:47]

Please clarify what this is used for, since it's not obvious when reading
WebContentsImpl code.  It's especially important to distinguish it from
FrameTree and FrameTreeNodes.

[lazyboy, 2015/05/05 07:28:15]

Done.

+  class WebContentsNode {

[Charlie Reis, 2015/04/30 23:06:47]

Perhaps this should just be a struct?

WebContentsTreeNode may also make the uses clearer.

[lazyboy, 2015/05/05 07:28:15]

Done.
Done.

+   public:
+    WebContentsNode();
+    ~WebContentsNode();
+
+    void set_parent_web_contents(WebContentsImpl* parent_web_contents) {
+      parent_web_contents_ = parent_web_contents;
+    }
+    WebContentsImpl* parent_web_contents() {
+      return parent_web_contents_;
+    }
+
+   private:
+    WebContentsImpl* parent_web_contents_;
+  };
+
   // See WebContents::Create for a description of these parameters.
   WebContentsImpl(BrowserContext* browser_context,
                   WebContentsImpl* opener);
@@ -1259,6 +1280,8 @@ class CONTENT_EXPORT WebContentsImpl
 
   bool virtual_keyboard_requested_;
 
+  WebContentsNode node_;

[Charlie Reis, 2015/04/30 23:06:47]

This needs a comment and should probably be up higher, perhaps above
frame_tree_.

[lazyboy, 2015/05/05 07:28:15]

Done.

+
 #if defined(ENABLE_BROWSER_CDMS)
   // Manages all the media player and CDM managers and forwards IPCs to them.
   scoped_ptr<MediaWebContentsObserver> media_web_contents_observer_;