<browser> Disable browser plugin in content_shell by default.

content/shell/shell_content_renderer_client.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/shell/shell_content_renderer_client.h"
 
 #include "base/command_line.h"
+#include "content/public/common/content_constants.h"
+#include "content/public/common/content_switches.h"
 #include "content/shell/shell_render_process_observer.h"
 #include "content/shell/shell_switches.h"
 #include "content/shell/webkit_test_runner.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginParams.h"
 #include "v8/include/v8.h"
 
 namespace content {
 
 ShellContentRendererClient::ShellContentRendererClient() {
 }
 
 ShellContentRendererClient::~ShellContentRendererClient() {
 }
 
 void ShellContentRendererClient::RenderThreadStarted() {
   shell_observer_.reset(new ShellRenderProcessObserver());
 }
 
 void ShellContentRendererClient::RenderViewCreated(RenderView* render_view) {
   if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree))
     return;
 
   new WebKitTestRunner(render_view);
 }
 
+bool ShellContentRendererClient::OverrideCreatePlugin(
+    RenderView* render_view,
+    WebKit::WebFrame* frame,
+    const WebKit::WebPluginParams& params,
+    WebKit::WebPlugin** plugin) {
+  std::string mime_type = params.mimeType.utf8();
+  if (mime_type == content::kBrowserPluginMimeType) {
+    // Allow browser plugin in content_shell only if it is forced by flag.
+    // Returning true here disables the plugin.
+    return !CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableBrowserPluginForAllViewTypes);
+  }
+  return false;
+}
+
 }  // namespace content