Enable find-in-page across GuestViews.

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 5a621c32adb4b39566006e10f588efde2b39d2f2..0cd245bb71a1dfdfda2997deded38e561426eddc 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -132,10 +132,13 @@ class CONTENT_EXPORT WebContentsImpl
 
   static std::vector<WebContentsImpl*> GetAllWebContents();
 
-  static WebContentsImpl* FromFrameTreeNode(FrameTreeNode* frame_tree_node);
+  static WebContentsImpl* FromFrameTreeNode(
+      const FrameTreeNode* frame_tree_node);
   static WebContents* FromRenderFrameHostID(int render_process_host_id,
                                             int render_frame_host_id);
   static WebContents* FromFrameTreeNodeId(int frame_tree_node_id);
+  static WebContentsImpl* FromOuterFrameTreeNode(
+      const FrameTreeNode* frame_tree_node);
 
   // Complex initialization here. Specifically needed to avoid having
   // members call back into our virtual functions in the constructor.
@@ -268,6 +271,24 @@ class CONTENT_EXPORT WebContentsImpl
   // interface.
   WebContentsBindingSet* GetBindingSet(const std::string& interface_name);
 
+  // Returns the focused WebContents.
+  // If there are multiple inner/outer WebContents (when embedding <webview>,
+  // <guestview>, ...) returns the single one containing the currently focused
+  // frame. Otherwise, returns this WebContents.
+  WebContentsImpl* GetFocusedWebContents();
+
+  // TODO(paulmeyer): Once GuestViews are no longer implemented as
+  // BrowserPluginGuests, frame traversal across WebContents should be moved to
+  // be handled by FrameTreeNode, and |GetInnerWebContents| and
+  // |GetWebContentsAndAllInner| can be removed.
+
+  // Returns a vector to the inner WebContents within this WebContents.
+  std::vector<WebContentsImpl*> GetInnerWebContents();
+
+  // Returns a vector containing this WebContents and all inner WebContents
+  // within it (recursively).
+  std::vector<WebContentsImpl*> GetWebContentsAndAllInner();
+
   // WebContents ------------------------------------------------------
   WebContentsDelegate* GetDelegate() override;
   void SetDelegate(WebContentsDelegate* delegate) override;
@@ -820,6 +841,10 @@ class CONTENT_EXPORT WebContentsImpl
   // deactivated.
   void SetAsFocusedWebContentsIfNecessary();
 
+  // Called by this WebContents's BrowserPluginGuest (if one exists) to indicate
+  // that the guest will be detached.
+  void BrowserPluginGuestWillDetach();
+
 #if defined(OS_ANDROID)
   // Called by FindRequestManager when all of the find match rects are in.
   void NotifyFindMatchRectsReply(int version,
@@ -895,7 +920,16 @@ class CONTENT_EXPORT WebContentsImpl
     WebContentsImpl* focused_web_contents() { return focused_web_contents_; }
     void SetFocusedWebContents(WebContentsImpl* web_contents);
 
+    // Returns the inner WebContents within |frame|, if one exists, or nullptr
+    // otherwise.
+    WebContentsImpl* GetInnerWebContentsInFrame(const FrameTreeNode* frame);
+
+    const std::vector<WebContentsImpl*>& inner_web_contents() const;
+
    private:
+    void AttachInnerWebContents(WebContentsImpl* inner_web_contents);
+    void DetachInnerWebContents(WebContentsImpl* inner_web_contents);
+
     // FrameTreeNode::Observer implementation.
     void OnFrameTreeNodeDestroyed(FrameTreeNode* node) final;
 
@@ -910,6 +944,9 @@ class CONTENT_EXPORT WebContentsImpl
     // |current_web_contents_| as an inner WebContents.
     int outer_contents_frame_tree_node_id_;
 
+    // List of inner WebContents that we host.
+    std::vector<WebContentsImpl*> inner_web_contents_;
+
     // Only the root node should have this set. This indicates the WebContents
     // whose frame tree has the focused frame. The WebContents tree could be
     // arbitrarily deep.
@@ -1087,12 +1124,6 @@ class CONTENT_EXPORT WebContentsImpl
   // receive page focus and blur events when the containing window changes focus
   // state.
 
-  // Returns the focused WebContents.
-  // If there are multiple inner/outer WebContents (when embedding <webview>,
-  // <guestview>, ...) returns the single one containing the currently focused
-  // frame. Otherwise, returns this WebContents.
-  WebContentsImpl* GetFocusedWebContents();
-
   // Returns true if |this| is the focused WebContents or an ancestor of the
   // focused WebContents.
   bool ContainsOrIsFocusedWebContents();
@@ -1193,7 +1224,11 @@ class CONTENT_EXPORT WebContentsImpl
   void SetJavaScriptDialogManagerForTesting(
       JavaScriptDialogManager* dialog_manager);
 
-  // Returns the FindRequestManager, or creates one if it doesn't already exist.
+  // Returns the FindRequestManager, which may be found in an outer WebContents.
+  FindRequestManager* GetFindRequestManager();
+
+  // Returns the FindRequestManager, or creates one if it doesn't already
+  // exist. The FindRequestManager may be found in an outer WebContents.
   FindRequestManager* GetOrCreateFindRequestManager();
 
   // Removes a registered WebContentsBindingSet by interface name.