[Aura] Added Support for rendering software compositor frames as cc::TextureLayers.

cc/output/software_output_device.cc

Index: cc/output/software_output_device.cc
diff --git a/cc/output/software_output_device.cc b/cc/output/software_output_device.cc
index 956ee6c5495510337196336dff84e992f4a177d6..5460b3f27b9c43ae863dddc0a91dde8371af46cc 100644
--- a/cc/output/software_output_device.cc
+++ b/cc/output/software_output_device.cc
@@ -34,9 +34,10 @@ SkCanvas* SoftwareOutputDevice::BeginPaint(gfx::Rect damage_rect) {
 void SoftwareOutputDevice::EndPaint(SoftwareFrameData* frame_data) {
   DCHECK(device_);
   if (frame_data) {
+    frame_data->id = 0;

[danakj, 2013/05/23 15:34:33]

This frame id seems to be completely unused right now. Can we add it in the CL
that will make use of it instead?

[slavi, 2013/05/28 18:55:13]

It gets overriden in 
content/renderer/gpu/compositor_software_output_device.cc
CompositorSoftwareOutputDevice::EndPaint

Do you mean, leave the base (this one) implementation empty?

     frame_data->size = viewport_size_;
     frame_data->damage_rect = damage_rect_;
-    frame_data->dib_id = TransportDIB::Id();
+    frame_data->handle = base::SharedMemory::NULLHandle();
   }
 }
 
@@ -55,7 +56,7 @@ void SoftwareOutputDevice::Scroll(
   NOTIMPLEMENTED();
 }
 
-void SoftwareOutputDevice::ReclaimDIB(const TransportDIB::Id& id) {
+void SoftwareOutputDevice::ReclaimSoftwareFrame(int id) {
   NOTIMPLEMENTED();
 }