Changes to content/ to facilitate new zoom extension API (work in progress)

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 997 matching lines @@
       !ShowingInterstitialPage() &&
       !static_cast<RenderViewHostImpl*>(
           GetRenderViewHost())->SuddenTerminationAllowed();
 }
 
 void WebContentsImpl::DispatchBeforeUnload(bool for_cross_site_transition) {
   static_cast<RenderFrameHostImpl*>(GetMainFrame())->DispatchBeforeUnload(
       for_cross_site_transition);
 }
 
+void WebContentsImpl::SetTemporaryZoomSettings(bool temporary_zoom_settings) {
+  temporary_zoom_settings_ = temporary_zoom_settings;

[jam, 2014/05/01 23:21:13]

seems that HostZoomMap::SetTemporaryZoomLevel should call an (internal)
WebContentsImpl to do this and we can avoid the public api on WebContents

+}
+
 void WebContentsImpl::Stop() {
   GetRenderManager()->Stop();
   FOR_EACH_OBSERVER(WebContentsObserver, observers_, NavigationStopped());
 }
 
 WebContents* WebContentsImpl::Clone() {
   // We use our current SiteInstance since the cloned entry will use it anyway.
   // We pass our own opener so that the cloned page can access it if it was
   // before.
   CreateParams create_params(GetBrowserContext(), GetSiteInstance());
@@ skipping 2839 matching lines @@
 
 void WebContentsImpl::OnPreferredSizeChanged(const gfx::Size& old_size) {
   if (!delegate_)
     return;
   const gfx::Size new_size = GetPreferredSize();
   if (new_size != old_size)
     delegate_->UpdatePreferredSize(this, new_size);
 }
 
 }  // namespace content