aw: Enable async ondraw

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 <utility>
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/compositor_frame_consumer.h"
@@ skipping 75 matching lines @@
 BrowserViewRenderer* BrowserViewRenderer::FromWebContents(
     content::WebContents* web_contents) {
   return BrowserViewRendererUserData::GetBrowserViewRenderer(web_contents);
 }
 
 BrowserViewRenderer::BrowserViewRenderer(
     BrowserViewRendererClient* client,
     const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner)
     : client_(client),
       ui_task_runner_(ui_task_runner),
-      async_on_draw_hardware_(base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kAsyncOnDrawHardware)),
+      sync_on_draw_hardware_(base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSyncOnDrawHardware)),
       current_compositor_frame_consumer_(nullptr),
       compositor_(nullptr),
       is_paused_(false),
       view_visible_(false),
       window_visible_(false),
       attached_to_window_(false),
       hardware_enabled_(false),
       dip_scale_(0.f),
       page_scale_factor_(1.f),
       min_page_scale_factor_(0.f),
@@ skipping 119 matching lines @@
   UpdateMemoryPolicy();
 
   gfx::Transform transform_for_tile_priority =
       external_draw_constraints_.transform;
 
   gfx::Rect viewport_rect_for_tile_priority =
       ComputeViewportRectForTilePriority();
 
   scoped_refptr<content::SynchronousCompositor::FrameFuture> future; // Async.
   content::SynchronousCompositor::Frame frame; // Sync.
-  bool async = async_on_draw_hardware_ && allow_async_draw_;
+  bool async = !sync_on_draw_hardware_ && allow_async_draw_;
   if (async) {
     future = compositor_->DemandDrawHwAsync(
         size_, viewport_rect_for_tile_priority, transform_for_tile_priority);
   } else {
     frame = compositor_->DemandDrawHw(size_, viewport_rect_for_tile_priority,
                                       transform_for_tile_priority);
   }
 
   if (!frame.frame && !future) {
     TRACE_EVENT_INSTANT0("android_webview", "NoNewFrame",
@@ skipping 517 matching lines @@
   base::StringAppendF(&str,
                       "overscroll_rounding_error_: %s ",
                       overscroll_rounding_error_.ToString().c_str());
   base::StringAppendF(
       &str, "on_new_picture_enable: %d ", on_new_picture_enable_);
   base::StringAppendF(&str, "clear_view: %d ", clear_view_);
   return str;
 }
 
 }  // namespace android_webview