<webview>: Support zoom in WebUI

content/browser/browser_plugin/browser_plugin_embedder.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/browser_plugin/browser_plugin_embedder.h"
 
 #include "base/values.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/browser_plugin/browser_plugin_guest_manager.h"
 #include "content/browser/browser_plugin/browser_plugin_host_factory.h"
@@ skipping 101 matching lines @@
   }
 
   WebContentsImpl* embedder =
       static_cast<WebContentsImpl*>(web_contents());
   return GetBrowserPluginGuestManager()->ForEachGuest(embedder, base::Bind(
       &BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback,
       base::Unretained(this),
       event));
 }
 
+bool BrowserPluginEmbedder::SetZoomLevelCallback(
+    double level, BrowserPluginGuest* guest) {
+  guest->GetWebContents()->SetZoomLevel(level);
+  // Not handled => Iterate over all guests.
+  return false;
+}
+
+void BrowserPluginEmbedder::SetZoomLevel(double level) {
+  WebContentsImpl* embedder =
+      static_cast<WebContentsImpl*>(web_contents());
+  GetBrowserPluginGuestManager()->ForEachGuest(embedder, base::Bind(
+      &BrowserPluginEmbedder::SetZoomLevelCallback,
+      base::Unretained(this),
+      level));
+}
+
 void BrowserPluginEmbedder::RenderProcessGone(base::TerminationStatus status) {
   CleanUp();
 }
 
 bool BrowserPluginEmbedder::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(BrowserPluginEmbedder, message)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_AllocateInstanceID,
                         OnAllocateInstanceID)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Attach, OnAttach)
@@ skipping 121 matching lines @@
   if (guest)
     render_view_host = guest->GetWebContents()->GetRenderViewHost();
   else  // No plugin, use embedder's RenderViewHost.
     render_view_host = web_contents()->GetRenderViewHost();
 
   callback_iter->second.Run(render_view_host, position.x(), position.y());
   pending_get_render_view_callbacks_.erase(callback_iter);
 }
 
 }  // namespace content