<webview>: Correctly shift focus between WebContents.

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 628 matching lines @@
   // void Paste() override;
   // void SelectAll() override;
   void MoveRangeSelectionExtent(const gfx::Point& extent) override;
   void SelectRange(const gfx::Point& base, const gfx::Point& extent) override;
   void AdjustSelectionByCharacterOffset(int start_adjust, int end_adjust)
       override;
   RenderWidgetHostInputEventRouter* GetInputEventRouter() override;
   void ReplicatePageFocus(bool is_focused) override;
   RenderWidgetHostImpl* GetFocusedRenderWidgetHost(
       RenderWidgetHostImpl* receiving_widget) override;
+  RenderWidgetHostImpl* GetRenderWidgetHostWithPageFocus() override;
+  void FocusOwningWebContents(
+      RenderWidgetHostImpl* render_widget_host) override;
   void RendererUnresponsive(RenderWidgetHostImpl* render_widget_host,
                             RendererUnresponsiveType type) override;
   void RendererResponsive(RenderWidgetHostImpl* render_widget_host) override;
   void RequestToLockMouse(RenderWidgetHostImpl* render_widget_host,
                           bool user_gesture,
                           bool last_unlocked_by_target,
                           bool privileged) override;
   bool IsFullscreenForCurrentTab() const override;
   blink::WebDisplayMode GetDisplayMode(
       RenderWidgetHostImpl* render_widget_host) const override;
@@ skipping 336 matching lines @@
                                const base::string16& main_text,
                                const base::string16& sub_text);
   void OnHideValidationMessage();
   void OnMoveValidationMessage(const gfx::Rect& anchor_in_root_view);
 
   // Called by derived classes to indicate that we're no longer waiting for a
   // response. This won't actually update the throbber, but it will get picked
   // up at the next animation step if the throbber is going.
   void SetNotWaitingForResponse() { waiting_for_response_ = false; }
 
+  // Inner WebContents Helpers -------------------------------------------------
+  //
+  // These functions are helpers in managing a hierarchy of WebContents
+  // involved in rendering inner WebContents.
+
+  // When multiple WebContents are present within a tab or window, a single one
+  // is focused and will route keyboard events in most cases to a RenderWidget
+  // contained within it. |GetFocusedWebContents()|'s main frame widget will
+  // 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();
+
+  // When inner or outer WebContents are present, become the focused
+  // WebContentsImpl. This will activate this content's main frame RenderWidget
+  // and indirectly all its subframe widgets.  GetFocusedRenderWidgetHost will
+  // search this WebContentsImpl for a focused RenderWidgetHost. The previously
+  // focused WebContentsImpl, if any, will have its RenderWidgetHosts
+  // deactivated.
+  void SetAsFocusedWebContentsIfNecessary();
+
   // Returns the root of the WebContents tree.
   WebContentsImpl* GetOutermostWebContents();
 
   // Navigation helpers --------------------------------------------------------
   //
   // These functions are helpers for Navigate() and DidNavigate().
 
   // Handles post-navigation tasks in DidNavigate AFTER the entry has been
   // committed to the navigation controller. Note that the navigation entry is
   // not provided since it may be invalid/changed after being committed. The
@@ skipping 436 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendZone);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_