cc: Add point-based UV coordinate on TextureLayer

cc/software_renderer.cc

Index: cc/software_renderer.cc
diff --git a/cc/software_renderer.cc b/cc/software_renderer.cc
index 44e758d101b116e1e0b33738f71427e887435d99..e56b1e4c959bc36cc25fef64fabfe3fa339850ce 100644
--- a/cc/software_renderer.cc
+++ b/cc/software_renderer.cc
@@ -258,8 +258,12 @@ void SoftwareRenderer::drawTextureQuad(const DrawingFrame& frame, const TextureD
     // FIXME: Add support for non-premultiplied alpha.
     ResourceProvider::ScopedReadLockSoftware lock(m_resourceProvider, quad->resource_id);
     const SkBitmap* bitmap = lock.skBitmap();
-    gfx::RectF uvRect = gfx::ScaleRect(quad->uv_rect, bitmap->width(), bitmap->height());
-    SkRect skUvRect = gfx::RectFToSkRect(uvRect);
+    gfx::PointF uv_top_left = gfx::ScalePoint(quad->uv_top_left, bitmap->width(), bitmap->height());
+    gfx::PointF uv_bottom_right = gfx::ScalePoint(quad->uv_bottom_right, bitmap->width(), bitmap->height());
+    SkRect skUvRect = SkRect::MakeXYWH(SkFloatToScalar(uv_top_left.x()),
+                                       SkFloatToScalar(uv_top_left.y()),
+                                       SkFloatToScalar(uv_bottom_right.x() - uv_top_left.x()),
+                                       SkFloatToScalar(uv_bottom_right.y() - uv_top_left.y()));
     if (quad->flipped)
         m_skCurrentCanvas->scale(1, -1);
     m_skCurrentCanvas->drawBitmapRectToRect(*bitmap, &skUvRect,