Coverity: Pass parameters by reference.

content/renderer/pepper_plugin_delegate_impl.cc

 // Copyright (c) 2011 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/pepper_plugin_delegate_impl.h"
 
 #include <cmath>
 #include <queue>
 
 #include "app/surface/transport_dib.h"
@@ skipping 360 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(PlatformVideoDecoderImpl);
 };
 
 class DispatcherWrapper
     : public webkit::ppapi::PluginDelegate::OutOfProcessProxy {
  public:
   DispatcherWrapper() {}
   virtual ~DispatcherWrapper() {}
 
   bool Init(base::ProcessHandle plugin_process_handle,
-            IPC::ChannelHandle channel_handle,
+            const IPC::ChannelHandle& channel_handle,
             PP_Module pp_module,
             pp::proxy::Dispatcher::GetInterfaceFunc local_get_interface);
 
   // OutOfProcessProxy implementation.
   virtual const void* GetProxiedInterface(const char* name) {
     return dispatcher_->GetProxiedInterface(name);
   }
   virtual void AddInstance(PP_Instance instance) {
     pp::proxy::HostDispatcher::SetForInstance(instance, dispatcher_.get());
   }
   virtual void RemoveInstance(PP_Instance instance) {
     pp::proxy::HostDispatcher::RemoveForInstance(instance);
   }
 
  private:
   scoped_ptr<pp::proxy::HostDispatcher> dispatcher_;
 };
 
 bool DispatcherWrapper::Init(
     base::ProcessHandle plugin_process_handle,
-    IPC::ChannelHandle channel_handle,
+    const IPC::ChannelHandle& channel_handle,
     PP_Module pp_module,
     pp::proxy::Dispatcher::GetInterfaceFunc local_get_interface) {
   dispatcher_.reset(new pp::proxy::HostDispatcher(
       plugin_process_handle, pp_module, local_get_interface));
 
   if (!dispatcher_->InitWithChannel(PepperPluginRegistry::GetInstance(),
                                     channel_handle, true)) {
     dispatcher_.reset();
     return false;
   }
@@ skipping 545 matching lines @@
 }
 
 void PepperPluginDelegateImpl::HasUnsupportedFeature() {
   render_view_->Send(new ViewHostMsg_PDFHasUnsupportedFeature(
       render_view_->routing_id()));
 }
 
 P2PSocketDispatcher* PepperPluginDelegateImpl::GetP2PSocketDispatcher() {
   return render_view_->p2p_socket_dispatcher();
 }