<webview>: Support zoom in WebUI

content/browser/browser_plugin/browser_plugin_embedder.cc

Index: content/browser/browser_plugin/browser_plugin_embedder.cc
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.cc b/content/browser/browser_plugin/browser_plugin_embedder.cc
index 1418f97ed45564e26c59ad6bea3e746baa3906d7..f81785744f2f9467da02439d38320397c7800197 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.cc
+++ b/content/browser/browser_plugin/browser_plugin_embedder.cc
@@ -90,6 +90,22 @@ bool BrowserPluginEmbedder::HandleKeyboardEvent(
       static_cast<WebContentsImpl*>(web_contents()), event);
 }
 
+void BrowserPluginEmbedder::SetZoomLevel(double level) {
+  base::Callback<void(BrowserPluginGuest*)> guest_callback = base::Bind(
+      &BrowserPluginEmbedder::GuestCallbackSetZoomLevel,
+      base::Unretained(this),
+      level);
+  WebContentsImpl* embedder_web_contents =
+      static_cast<WebContentsImpl*>(web_contents());
+  GetBrowserPluginGuestManager()->GetGuests(embedder_web_contents,
+                                            guest_callback);
+}
+
+void BrowserPluginEmbedder::GuestCallbackSetZoomLevel(
+    double level, BrowserPluginGuest* guest) {
+  guest->GetWebContents()->SetZoomLevel(level);
+}
+
 void BrowserPluginEmbedder::RenderProcessGone(base::TerminationStatus status) {
   CleanUp();
 }