Tiling priorities in Android Webview.

android_webview/browser/browser_view_renderer_client.h

 // Copyright 2014 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 ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_CLIENT_H_
 #define ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_CLIENT_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/size_f.h"
@@ skipping 10 matching lines @@
   // the mode may be promoted to kModeDraw.
   virtual bool RequestDrawGL(jobject canvas, bool wait_for_completion) = 0;
 
   // Called when a new Picture is available. Needs to be enabled
   // via the EnableOnNewPicture method.
   virtual void OnNewPicture() = 0;
 
   // Called to trigger view invalidations.
   virtual void PostInvalidate() = 0;
 
+  // Called to trigger an invalidation on the view, if there is not another
+  // invalidate pending and the parent draw constraints in browser view
+  // renderer becomes stale.
+  virtual void InvalidateOnceIfNeeded() = 0;

[boliu, 2014/07/29 23:50:41]

Call this something like "ParentConstraintsUpdated".

[hush (inactive), 2014/07/30 00:11:32]

Renamed it to UpdateParentDrawConstraints. And renamed the function in shared
renderer state as well.
On 2014/07/29 23:50:41, boliu wrote:

+
   // Called to get view's absolute location on the screen.
   virtual gfx::Point GetLocationOnScreen() = 0;
 
   // Try to set the view's scroll offset to |new_value|.
   virtual void ScrollContainerViewTo(gfx::Vector2d new_value) = 0;
 
   // Is a Android view system managed fling in progress?
   virtual bool IsFlingActive() const = 0;
 
   // Sets the following:
@@ skipping 10 matching lines @@
   // Handle overscroll.
   virtual void DidOverscroll(gfx::Vector2d overscroll_delta) = 0;
 
  protected:
   virtual ~BrowserViewRendererClient() {}
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_CLIENT_H_