Implement transform/clip support for Android WebView.

cc/output/software_renderer.cc

Index: cc/output/software_renderer.cc
diff --git a/cc/output/software_renderer.cc b/cc/output/software_renderer.cc
index b555b57e6abbb11aea15779530a0d98dd857c8f6..5716bb044e9daa29a726c7bd853b98cd65c2fd68 100644
--- a/cc/output/software_renderer.cc
+++ b/cc/output/software_renderer.cc
@@ -53,11 +53,10 @@ scoped_ptr<SoftwareRenderer> SoftwareRenderer::Create(
 SoftwareRenderer::SoftwareRenderer(RendererClient* client,
                                    OutputSurface* output_surface,
                                    ResourceProvider* resource_provider)
-  : DirectRenderer(client, resource_provider),
+  : DirectRenderer(client, output_surface, resource_provider),
     visible_(true),
     is_scissor_enabled_(false),
     is_viewport_changed_(true),
-    output_surface_(output_surface),
     output_device_(output_surface->software_device()),
     current_canvas_(NULL) {
   if (resource_provider_) {
@@ -88,7 +87,7 @@ void SoftwareRenderer::BeginDrawingFrame(DrawingFrame* frame) {
   TRACE_EVENT0("cc", "SoftwareRenderer::BeginDrawingFrame");
   if (is_viewport_changed_) {
     is_viewport_changed_ = false;
-    output_device_->Resize(ViewportSize());
+    output_device_->Resize(client_->DeviceViewport().size());
   }
   root_canvas_ = output_device_->BeginPaint(
       gfx::ToEnclosingRect(frame->root_damage_rect));
@@ -146,14 +145,15 @@ void SoftwareRenderer::BindFramebufferToOutputSurface(DrawingFrame* frame) {
 bool SoftwareRenderer::BindFramebufferToTexture(
     DrawingFrame* frame,
     const ScopedResource* texture,
-    gfx::Rect framebuffer_rect) {
+    gfx::Rect target_rect) {
   current_framebuffer_lock_.reset();
   current_framebuffer_lock_ = make_scoped_ptr(
       new ResourceProvider::ScopedWriteLockSoftware(
           resource_provider_, texture->id()));
   current_canvas_ = current_framebuffer_lock_->sk_canvas();
-  InitializeMatrices(frame, framebuffer_rect, false);
-  SetDrawViewportSize(framebuffer_rect.size());
+  InitializeMatrices(
+      frame, target_rect, gfx::Rect(target_rect.size()), false);
+  SetDrawViewport(gfx::Rect(target_rect.size()));
 
   return true;
 }
@@ -193,7 +193,7 @@ void SoftwareRenderer::ClearFramebuffer(DrawingFrame* frame) {
   }
 }
 
-void SoftwareRenderer::SetDrawViewportSize(gfx::Size viewport_size) {}
+void SoftwareRenderer::SetDrawViewport(gfx::Rect viewport) {}
 
 bool SoftwareRenderer::IsSoftwareResource(
     ResourceProvider::ResourceId resource_id) const {