Disable partial swaps for webview guest renderer until we can figure out how to do that properly.

content/renderer/render_view_impl.cc

 // 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.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 716 matching lines @@
   if (opener_id_ == MSG_ROUTING_NONE) {
     did_show_ = true;
     CompleteInit();
   }
 
   g_view_map.Get().insert(std::make_pair(webview(), this));
   g_routing_id_view_map.Get().insert(std::make_pair(routing_id_, this));
   webview()->setDeviceScaleFactor(device_scale_factor_);
   webview()->settings()->setAcceleratedCompositingForFixedPositionEnabled(
       ShouldUseFixedPositionCompositing(device_scale_factor_));
+  allow_partial_swap_ = params->renderer_prefs.allow_partial_swap;

[jamesr, 2013/03/06 22:37:59]

We store the entire renderer_prefs struct in renderer_prefs_.  Why spend extra
memory keeping an additional copy of the bool?

[alexst (slow to review), 2013/03/06 23:12:34]

renderer_preferences_ is stored on RenderViewImpl, and RenderWIdgetCompositor
has RenderWidget. I added the bool as an alternative to making
allow_partial_swap()  virtual.

 
   webkit_preferences_.Apply(webview());
   webview()->initializeMainFrame(this);
 
   if (command_line.HasSwitch(switches::kEnableTouchDragDrop))
     webview()->settings()->setTouchDragDropEnabled(true);
 
   if (!params->frame_name.empty())
     webview()->mainFrame()->setName(params->frame_name);
   webview()->settings()->setMinimumTimerInterval(
@@ skipping 6000 matching lines @@
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);
   RenderProcess::current()->ReleaseTransportDIB(dib);
 }
 
 void RenderViewImpl::DidCommitCompositorFrame() {
   RenderWidget::DidCommitCompositorFrame();
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, DidCommitCompositorFrame());
 }
 
 }  // namespace content