Use the WebKit default fonts when specifying generic font families.

ppapi/proxy/plugin_dispatcher.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 "ppapi/proxy/plugin_dispatcher.h"
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 22 matching lines @@
 namespace {
 
 typedef std::map<PP_Instance, PluginDispatcher*> InstanceToDispatcherMap;
 InstanceToDispatcherMap* g_instance_to_dispatcher = NULL;
 
 }  // namespace
 
 PluginDispatcher::PluginDispatcher(base::ProcessHandle remote_process_handle,
                                    GetInterfaceFunc get_interface)
     : Dispatcher(remote_process_handle, get_interface),
-      plugin_delegate_(NULL) {
+      plugin_delegate_(NULL),
+      received_preferences_(false) {
   SetSerializationRules(new PluginVarSerializationRules);
 
   // As a plugin, we always support the PPP_Class interface. There's no
   // GetInterface call or name for it, so we insert it into our table now.
   target_proxies_[INTERFACE_ID_PPP_CLASS].reset(new PPP_Class_Proxy(this));
 
   ::ppapi::TrackerBase::Init(
       &PluginResourceTracker::GetTrackerBaseInstance);
 }
 
@@ skipping 61 matching lines @@
                "Line", IPC_MESSAGE_ID_LINE(msg.type()));
   // Handle common control messages.
   if (Dispatcher::OnMessageReceived(msg))
     return true;
 
   if (msg.routing_id() == MSG_ROUTING_CONTROL) {
     // Handle some plugin-specific control messages.
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(PluginDispatcher, msg)
       IPC_MESSAGE_HANDLER(PpapiMsg_SupportsInterface, OnMsgSupportsInterface)
+      IPC_MESSAGE_HANDLER(PpapiMsg_SetPreferences, OnMsgSetPreferences)
     IPC_END_MESSAGE_MAP()
     return handled;
   }
 
   if (msg.routing_id() <= 0 && msg.routing_id() >= INTERFACE_ID_COUNT) {
     // Host is sending us garbage. Since it's supposed to be trusted, this
     // isn't supposed to happen. Crash here in all builds in case the renderer
     // is compromised.
     CHECK(false);
     return true;
@@ skipping 132 matching lines @@
 
   // Query the plugin & cache the result.
   const void* interface_functions = GetLocalInterface(interface_name.c_str());
   if (!interface_functions)
     return;
   target_proxies_[info->id].reset(
       info->create_proxy(this, interface_functions));
   *result = true;
 }
 
+void PluginDispatcher::OnMsgSetPreferences(const ::ppapi::Preferences& prefs) {
+  // The renderer may send us preferences more than once (currently this
+  // happens every time a new plugin instance is created). Since we don't have
+  // a way to signal to the plugin that the preferences have changed, changing
+  // the default fonts and such in the middle of a running plugin could be
+  // confusing to it. As a result, we never allow the preferences to be changed
+  // once they're set. The user will have to restart to get new font prefs
+  // propogated to plugins.
+  if (!received_preferences_) {
+    received_preferences_ = true;
+    preferences_ = prefs;
+  }
+}
+
 }  // namespace proxy
 }  // namespace pp