Implement on demand quad rasterization for PicturePiles.

content/common/cc_messages.cc

Index: content/common/cc_messages.cc
diff --git a/content/common/cc_messages.cc b/content/common/cc_messages.cc
index 5ec8ae81cf0346ed8254a9c38c20295d4bb34742..401178e8de150e23f7dade60d8ab7f457476e032 100644
--- a/content/common/cc_messages.cc
+++ b/content/common/cc_messages.cc
@@ -320,6 +320,9 @@ void ParamTraits<cc::RenderPass>::Write(
       case cc::DrawQuad::IO_SURFACE_CONTENT:
         WriteParam(m, *cc::IOSurfaceDrawQuad::MaterialCast(quad));
         break;
+      case cc::DrawQuad::PICTURE_CONTENT:
+        NOTIMPLEMENTED();

[piman, 2013/03/26 17:19:30]

nit: NOTREACHED() or DCHECK.
Not writing anything will confuse the reader (it expects the right number of
quads), so make sure to assert on the writer side so that this can be tracked at
the origin.

[danakj, 2013/03/26 17:28:52]

Oh, I had requested this, because NOTREACHED() will also randomly DCHECK if we
turn on implside painting. Didn't think about the number of quads. :/ I'll file
a bug.

[Leandro Graciá Gil, 2013/03/26 18:05:02]

Ok, in that case I'll change these back to NOTREACHED().

+        break;
       case cc::DrawQuad::TEXTURE_CONTENT:
         WriteParam(m, *cc::TextureDrawQuad::MaterialCast(quad));
         break;
@@ -434,6 +437,9 @@ bool ParamTraits<cc::RenderPass>::Read(
       case cc::DrawQuad::IO_SURFACE_CONTENT:
         draw_quad = ReadDrawQuad<cc::IOSurfaceDrawQuad>(m, iter);
         break;
+      case cc::DrawQuad::PICTURE_CONTENT:
+        NOTIMPLEMENTED();
+        return false;
       case cc::DrawQuad::TEXTURE_CONTENT:
         draw_quad = ReadDrawQuad<cc::TextureDrawQuad>(m, iter);
         break;
@@ -513,6 +519,9 @@ void ParamTraits<cc::RenderPass>::Log(
       case cc::DrawQuad::IO_SURFACE_CONTENT:
         LogParam(*cc::IOSurfaceDrawQuad::MaterialCast(quad), l);
         break;
+      case cc::DrawQuad::PICTURE_CONTENT:
+        NOTIMPLEMENTED();
+        break;
       case cc::DrawQuad::TEXTURE_CONTENT:
         LogParam(*cc::TextureDrawQuad::MaterialCast(quad), l);
         break;