Use the solid color detection to create solid layers

cc/test/fake_content_layer_client.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/fake_content_layer_client.h"
 
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
-FakeContentLayerClient::FakeContentLayerClient() : last_canvas_(NULL) {
+FakeContentLayerClient::FakeContentLayerClient()
+    : fill_with_nonsolid_color_(false), last_canvas_(NULL) {
 }
 
 FakeContentLayerClient::~FakeContentLayerClient() {
 }
 
 void FakeContentLayerClient::PaintContents(
     SkCanvas* canvas,
     const gfx::Rect& paint_rect,
     ContentLayerClient::GraphicsContextStatus gc_status) {
   last_canvas_ = canvas;
   last_context_status_ = gc_status;
 
   canvas->clipRect(gfx::RectToSkRect(paint_rect));
   for (RectPaintVector::const_iterator it = draw_rects_.begin();
       it != draw_rects_.end(); ++it) {
     const gfx::RectF& draw_rect = it->first;
     const SkPaint& paint = it->second;
     canvas->drawRectCoords(draw_rect.x(),
                            draw_rect.y(),
                            draw_rect.right(),
                            draw_rect.bottom(),
                            paint);
   }
 
   for (BitmapVector::const_iterator it = draw_bitmaps_.begin();
       it != draw_bitmaps_.end(); ++it) {
     canvas->drawBitmap(it->bitmap, it->point.x(), it->point.y(), &it->paint);
   }
+
+  // Add a rectangle to the middle that doesn't fill |paint_rect| so that solid
+  // color analysis will fail.
+  if (fill_with_nonsolid_color_) {
+    gfx::RectF draw_rect = paint_rect;
+    draw_rect.Inset(draw_rect.width() / 4.0f, draw_rect.height() / 4.0f);
+    SkPaint paint;
+    canvas->drawRectCoords(draw_rect.x(),
+                           draw_rect.y(),
+                           draw_rect.right(),
+                           draw_rect.bottom(),
+                           paint);
+  }
 }
 
 bool FakeContentLayerClient::FillsBoundsCompletely() const { return false; }
 
 }  // namespace cc