[Android]Increase Scrollbar fade delay on Resize.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 344 matching lines @@
   settings.report_overscroll_only_for_scrollable_axes =
       !synchronous_compositor_factory;
   settings.max_partial_texture_updates = 0;
   if (synchronous_compositor_factory) {
     // Android WebView uses system scrollbars, so make ours invisible.
     settings.scrollbar_animator = cc::LayerTreeSettings::NoAnimator;
     settings.solid_color_scrollbar_color = SK_ColorTRANSPARENT;
   } else {
     settings.scrollbar_animator = cc::LayerTreeSettings::LinearFade;
     settings.scrollbar_fade_delay_ms = 300;
+    settings.scrollbar_fade_resize_delay_ms = 2000;
     settings.scrollbar_fade_duration_ms = 300;
     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
   }
   settings.highp_threshold_min = 2048;
   // Android WebView handles root layer flings itself.
   settings.ignore_root_layer_flings =
       synchronous_compositor_factory;
   // Memory policy on Android WebView does not depend on whether device is
   // low end, so always use default policy.
   bool is_low_end_device =
@@ skipping 24 matching lines @@
     settings.scrollbar_animator = cc::LayerTreeSettings::Thinning;
     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
   } else if (cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport)) {
     // use_pinch_zoom_scrollbars is only true on desktop when non-overlay
     // scrollbars are in use.
     settings.use_pinch_zoom_scrollbars = true;
     settings.scrollbar_animator = cc::LayerTreeSettings::LinearFade;
     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
   }
   settings.scrollbar_fade_delay_ms = 500;
+  settings.scrollbar_fade_resize_delay_ms = 2000;

[aelias_OOO_until_Jul13, 2014/10/01 18:41:26]

Please set this to 500 since the page-load fade-spam problem doesn't affect
desktop pinch zoom scrollbars.

[MuVen, 2014/10/02 08:42:47]

Done.

   settings.scrollbar_fade_duration_ms = 300;
 #endif
 
   if (cmd->HasSwitch(switches::kEnableLowResTiling))
     settings.create_low_res_tiling = true;
   if (cmd->HasSwitch(switches::kDisableLowResTiling))
     settings.create_low_res_tiling = false;
 
   compositor->Initialize(settings);
 
@@ skipping 430 matching lines @@
   widget_->OnSwapBuffersAborted();
 }
 
 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 }  // namespace content