Android WebView: fix missing an invalidate

android_webview/browser/browser_view_renderer.cc

 // 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.
 
 #include "android_webview/browser/browser_view_renderer.h"
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/shared_renderer_state.h"
 #include "android_webview/common/aw_switches.h"
 #include "android_webview/public/browser/draw_gl.h"
@@ skipping 240 matching lines @@
 
 bool BrowserViewRenderer::OnDrawHardware(jobject java_canvas) {
   TRACE_EVENT0("android_webview", "BrowserViewRenderer::OnDrawHardware");
   if (!compositor_)
     return false;
 
   if (last_on_draw_global_visible_rect_.IsEmpty()) {
     TRACE_EVENT_INSTANT0("android_webview",
                          "EarlyOut_EmptyVisibleRect",
                          TRACE_EVENT_SCOPE_THREAD);
+    shared_renderer_state_->SetForceInvalidateOnNextDrawGL(true);
     return client_->RequestDrawGL(java_canvas, false);
   }
 
   if (!hardware_enabled_) {
     hardware_enabled_ = compositor_->InitializeHwDraw();
     if (hardware_enabled_) {
       tile_manager_key_ = GlobalTileManager::GetInstance()->PushBack(this);
     }
   }
   if (!hardware_enabled_)
@@ skipping 48 matching lines @@
 
   frame->AssignTo(&draw_gl_input->frame);
   shared_renderer_state_->SetDrawGLInput(draw_gl_input.Pass());
   DidComposite();
   return client_->RequestDrawGL(java_canvas, false);
 }
 
 void BrowserViewRenderer::UpdateParentDrawConstraints() {
   // Post an invalidate if the parent draw constraints are stale and there is
   // no pending invalidate.
-  if (!parent_draw_constraints_.Equals(
-          shared_renderer_state_->ParentDrawConstraints()))
+  if (shared_renderer_state_->NeedsForceInvalidateOnNextDrawGL() ||
+      !parent_draw_constraints_.Equals(
+        shared_renderer_state_->ParentDrawConstraints())) {
+    shared_renderer_state_->SetForceInvalidateOnNextDrawGL(false);
     EnsureContinuousInvalidation(true);
+  }
 }
 
 void BrowserViewRenderer::ReturnUnusedResource(scoped_ptr<DrawGLInput> input) {
   if (!input.get())
     return;
 
   cc::CompositorFrameAck frame_ack;
   cc::TransferableResource::ReturnResources(
       input->frame.delegated_frame_data->resource_list,
       &frame_ack.resources);
@@ skipping 474 matching lines @@
     base::StringAppendF(&str,
                         "surface width height: [%d %d] ",
                         draw_info->width,
                         draw_info->height);
     base::StringAppendF(&str, "is_layer: %d ", draw_info->is_layer);
   }
   return str;
 }
 
 }  // namespace android_webview