[Linux] Load plugins out-of-process.

content/browser/plugin_loader_posix.cc

Index: content/browser/plugin_loader_posix.cc
diff --git a/content/browser/plugin_loader_posix.cc b/content/browser/plugin_loader_posix.cc
index e27e543aa5805f61180657228845a94587947ce9..a68e9fe09c995daf07f07fad91fa4b13acc03a83 100644
--- a/content/browser/plugin_loader_posix.cc
+++ b/content/browser/plugin_loader_posix.cc
@@ -45,6 +45,7 @@ void PluginLoaderPosix::OnProcessCrashed(int exit_code) {
   canonical_list_.erase(canonical_list_.begin(),
                         canonical_list_.begin() + next_load_index_ + 1);
   next_load_index_ = 0;
+
   LoadPluginsInternal();
 }
 
@@ -82,6 +83,11 @@ void PluginLoaderPosix::GetPluginsToLoad() {
 void PluginLoaderPosix::LoadPluginsInternal() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
+  // Check if the list is empty or all plugins have already been loaded before
+  // forking.
+  if (MaybeRunPendingCallbacks())
+    return;
+
   if (load_start_time_.is_null())
     load_start_time_ = base::TimeTicks::Now();
 
@@ -106,7 +112,7 @@ void PluginLoaderPosix::OnPluginLoaded(const webkit::WebPluginInfo& plugin) {
 
   ++next_load_index_;
 
-  RunPendingCallbacks();
+  MaybeRunPendingCallbacks();
 }
 
 void PluginLoaderPosix::OnPluginLoadFailed(const FilePath& plugin_path) {
@@ -119,7 +125,7 @@ void PluginLoaderPosix::OnPluginLoadFailed(const FilePath& plugin_path) {
   ++next_load_index_;
 
   MaybeAddInternalPlugin(plugin_path);
-  RunPendingCallbacks();
+  MaybeRunPendingCallbacks();
 }
 
 bool PluginLoaderPosix::MaybeAddInternalPlugin(const FilePath& plugin_path) {
@@ -136,9 +142,9 @@ bool PluginLoaderPosix::MaybeAddInternalPlugin(const FilePath& plugin_path) {
   return false;
 }
 
-void PluginLoaderPosix::RunPendingCallbacks() {
+bool PluginLoaderPosix::MaybeRunPendingCallbacks() {
   if (next_load_index_ < canonical_list_.size())
-    return;
+    return false;
 
   PluginList::Singleton()->SetPlugins(loaded_plugins_);
   for (std::vector<PendingCallback>::iterator it = callbacks_.begin();
@@ -153,6 +159,8 @@ void PluginLoaderPosix::RunPendingCallbacks() {
                   (base::TimeTicks::Now() - load_start_time_)
                       * base::Time::kMicrosecondsPerMillisecond);
   load_start_time_ = base::TimeTicks();
+
+  return true;
 }
 
 PluginLoaderPosix::PendingCallback::PendingCallback(