Refactor ExtensionView to support a UI-less extension instance.

- Introduce ExtensionHost, which is the guy that talks to the RenderViewHost.
- ExtensionView holds an ExtensionHost, and also renders its contents in an
  HWND.
- Added code to load a page optionally specified in the manifest as a
  background process whenever it exists.
Review URL: http://codereview.chromium.org/92043

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14902 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 14 insertions, 8 deletions

diff --git a/chrome/browser/renderer_host/render_view_host.cc b/chrome/browser/renderer_host/render_view_host.cc
index d778250..3646358 100644
--- a/chrome/browser/renderer_host/render_view_host.cc
+++ b/chrome/browser/renderer_host/render_view_host.cc
@@ -160,14 +160,12 @@ bool RenderViewHost::CreateRenderView() {
       "Couldn't duplicate the modal dialog handle for the renderer.";
 #endif
 
-  DCHECK(view());
-
   ModalDialogEvent modal_dialog_event;
 #if defined(OS_WIN)
   modal_dialog_event.event = modal_dialog_event_handle;
 #endif
 
-  Send(new ViewMsg_New(gfx::IdFromNativeView(view()->GetPluginNativeView()),
+  Send(new ViewMsg_New(GetPluginNativeViewId(),
                        modal_dialog_event,
                        delegate_->GetWebkitPrefs(),
                        routing_id()));
diff --git a/chrome/browser/renderer_host/render_widget_host.cc b/chrome/browser/renderer_host/render_widget_host.cc
index 9e07de7..7a2122a 100644
--- a/chrome/browser/renderer_host/render_widget_host.cc
+++ b/chrome/browser/renderer_host/render_widget_host.cc
@@ -4,7 +4,6 @@
 
 #include "chrome/browser/renderer_host/render_widget_host.h"
 
-#include "base/gfx/native_widget_types.h"
 #include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/keyboard_codes.h"
@@ -79,15 +78,19 @@ RenderWidgetHost::~RenderWidgetHost() {
   process_->Release(routing_id_);
 }
 
+gfx::NativeViewId RenderWidgetHost::GetPluginNativeViewId() {
+  if (view_)
+    return gfx::IdFromNativeView(view_->GetPluginNativeView());
+  return NULL;
+}
+
 void RenderWidgetHost::Init() {
   DCHECK(process_->channel());
 
   renderer_initialized_ = true;
 
   // Send the ack along with the information on placement.
-  gfx::NativeView plugin_view = view_->GetPluginNativeView();
-  Send(new ViewMsg_CreatingNew_ACK(routing_id_,
-                                   gfx::IdFromNativeView(plugin_view)));
+  Send(new ViewMsg_CreatingNew_ACK(routing_id_, GetPluginNativeViewId()));
   WasResized();
 }
 
@@ -459,7 +462,8 @@ void RenderWidgetHost::OnMsgClose() {
 
 void RenderWidgetHost::OnMsgRequestMove(const gfx::Rect& pos) {
   // Note that we ignore the position.
-  view_->SetSize(pos.size());
+  if (view_)
+    view_->SetSize(pos.size());
 }
 
 void RenderWidgetHost::OnMsgPaintRect(
diff --git a/chrome/browser/renderer_host/render_widget_host.h b/chrome/browser/renderer_host/render_widget_host.h
index 0e93a84..861152a 100644
--- a/chrome/browser/renderer_host/render_widget_host.h
+++ b/chrome/browser/renderer_host/render_widget_host.h
@@ -8,6 +8,7 @@
 #include <queue>
 #include <vector>
 
+#include "base/gfx/native_widget_types.h"
 #include "base/gfx/size.h"
 #include "base/scoped_ptr.h"
 #include "base/timer.h"
@@ -267,6 +268,9 @@ class RenderWidgetHost : public IPC::Channel::Listener {
   // consistent if a new renderer is created.
   void RendererExited();
 
+  // Retrieves the native view used to contain plugins.
+  gfx::NativeViewId GetPluginNativeViewId();
+
   // Called when we an InputEvent was not processed by the renderer. This is
   // overridden by RenderView to send upwards to its delegate.
   virtual void UnhandledKeyboardEvent(const NativeWebKeyboardEvent& event) {}