cc: Remove the opaque rect return-parameter from ContentLayerClient.

cc/test/fake_content_layer_client.cc

Index: cc/test/fake_content_layer_client.cc
diff --git a/cc/test/fake_content_layer_client.cc b/cc/test/fake_content_layer_client.cc
index 9f75d8920bb69d52c49eb5be432425a9fb2592ac..143f484348462cb0246855d91de048115ec90cb5 100644
--- a/cc/test/fake_content_layer_client.cc
+++ b/cc/test/fake_content_layer_client.cc
@@ -9,8 +9,8 @@
 
 namespace cc {
 
-FakeContentLayerClient::FakeContentLayerClient()
-    : paint_all_opaque_(false), last_canvas_(NULL) {}
+FakeContentLayerClient::FakeContentLayerClient() : last_canvas_(NULL) {
+}
 
 FakeContentLayerClient::~FakeContentLayerClient() {
 }
@@ -18,14 +18,10 @@ FakeContentLayerClient::~FakeContentLayerClient() {
 void FakeContentLayerClient::PaintContents(
     SkCanvas* canvas,
     const gfx::Rect& paint_rect,
-    gfx::RectF* opaque_rect,
     ContentLayerClient::GraphicsContextStatus gc_status) {
   last_canvas_ = canvas;
   last_context_status_ = gc_status;
 
-  if (paint_all_opaque_)
-    *opaque_rect = paint_rect;
-
   canvas->clipRect(gfx::RectToSkRect(paint_rect));
   for (RectPaintVector::const_iterator it = draw_rects_.begin();
       it != draw_rects_.end(); ++it) {