linux: new socket/plug code for windowed plugins

This CL reworks the GtkSocket/GtkPlug code for windowed plugins on linux. Instead of having the plugin ask the browser to create a socket to plug into, it simply creates a plug and sends it to the browser. The browser creates a socket and attaches the plug when the socket becomes realized

This fixes 2 main issues:
- we can create windowed plugins in background tabs (Issue 16125)
- we can detach tabs with windowed plugins and reattach them (Issue 17110)

I reworked the IPCs, so it removes some amount of linux-specific things. We also need less synchronous IPCs to create/destroy plugins, so that should be a bit faster. In particular, I removed the plugin pid map, and instead made sure the renderer always destroys the plugin containers if the plugin process crashes - they will be destroyed if the renderer process crashes. Let me know if you have an issue with that.

Also, the intermediate plug/socket creation now happens in webplugin_delegate_impl_gtk. That means test_shell uses it as well. It made the code a lot simpler, and means we're testing it as well, albeit with a bit of extra overhead.

Bonus: I found a big bad bug in the GtkPluginContainer that made its width/height alias with some internal gtk structures. That was certainly causing some amounts of bugs.

Bonus 2: scrolling now looks more in sync with the rest of the page, though I'm not exactly sure which part caused that.

BUG=16125,17110
TEST=a lot of manual testing involving YouTube videos

Review URL: http://codereview.chromium.org/174295


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24309 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 7 deletions

diff --git a/chrome/browser/renderer_host/render_widget_host.cc b/chrome/browser/renderer_host/render_widget_host.cc
index c7d7e19..40fba47 100644
--- a/chrome/browser/renderer_host/render_widget_host.cc
+++ b/chrome/browser/renderer_host/render_widget_host.cc
@@ -782,15 +782,12 @@ void RenderWidgetHost::OnMsgImeUpdateStatus(int control,
 
 #if defined(OS_LINUX)
 
-void RenderWidgetHost::OnMsgCreatePluginContainer(
-    base::ProcessId pid,
-    gfx::PluginWindowHandle* container) {
-  *container = view_->CreatePluginContainer(pid);
+void RenderWidgetHost::OnMsgCreatePluginContainer(gfx::PluginWindowHandle id) {
+  view_->CreatePluginContainer(id);
 }
 
-void RenderWidgetHost::OnMsgDestroyPluginContainer(
-    gfx::PluginWindowHandle container) {
-  view_->DestroyPluginContainer(container);
+void RenderWidgetHost::OnMsgDestroyPluginContainer(gfx::PluginWindowHandle id) {
+  view_->DestroyPluginContainer(id);
 }
 
 #elif defined(OS_MACOSX)