Implement on demand quad rasterization for PicturePiles.

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index fd4a85ae1caa3b84baf979acd5d26efc89d90fb5..1322990936959d69a654f2f91394c0a01c30f982 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -12,6 +12,7 @@
 #include "cc/layers/quad_sink.h"
 #include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/debug_border_draw_quad.h"
+#include "cc/quads/picture_draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/trees/layer_tree_impl.h"
@@ -111,6 +112,9 @@ void PictureLayerImpl::AppendQuads(QuadSink* quadSink,
             mode == ManagedTileState::DrawingInfo::TRANSPARENT_MODE) {
           color = DebugColors::SolidColorTileBorderColor();
           width = DebugColors::SolidColorTileBorderWidth(layer_tree_impl());
+        } else if (mode == ManagedTileState::DrawingInfo::PICTURE_PILE_MODE) {
+          color = DebugColors::PictureTileBorderColor();
+          width = DebugColors::PictureTileBorderWidth(layer_tree_impl());
         } else if (iter->priority(ACTIVE_TREE).resolution == HIGH_RESOLUTION) {
           color = DebugColors::HighResTileBorderColor();
           width = DebugColors::HighResTileBorderWidth(layer_tree_impl());
@@ -169,11 +173,15 @@ void PictureLayerImpl::AppendQuads(QuadSink* quadSink,
     }
 
     const ManagedTileState::DrawingInfo& drawing_info = iter->drawing_info();
-    switch (drawing_info.mode()) {
-      case ManagedTileState::DrawingInfo::TEXTURE_MODE: {
-        if (iter->contents_scale() != ideal_contents_scale_)
-          appendQuadsData->hadIncompleteTile = true;
+    ManagedTileState::DrawingInfo::Mode mode = drawing_info.mode();
+    if (mode == ManagedTileState::DrawingInfo::TEXTURE_MODE ||
+        mode == ManagedTileState::DrawingInfo::PICTURE_PILE_MODE) {
+      if (iter->contents_scale() != ideal_contents_scale_)
+        appendQuadsData->hadIncompleteTile = true;
+    }
 
+    switch (mode) {
+      case ManagedTileState::DrawingInfo::TEXTURE_MODE: {
         gfx::RectF texture_rect = iter.texture_rect();
         gfx::Rect opaque_rect = iter->opaque_rect();
         opaque_rect.Intersect(content_rect);
@@ -189,6 +197,24 @@ void PictureLayerImpl::AppendQuads(QuadSink* quadSink,
         quadSink->Append(quad.PassAs<DrawQuad>(), appendQuadsData);
         break;
       }
+      case ManagedTileState::DrawingInfo::PICTURE_PILE_MODE: {
+        gfx::RectF texture_rect = iter.texture_rect();
+        gfx::Rect opaque_rect = iter->opaque_rect();
+        opaque_rect.Intersect(content_rect);
+
+        scoped_ptr<PictureDrawQuad> quad = PictureDrawQuad::Create();
+        quad->SetNew(sharedQuadState,
+                     geometry_rect,
+                     opaque_rect,
+                     texture_rect,
+                     iter.texture_size(),
+                     drawing_info.contents_swizzled(),
+                     iter->content_rect(),
+                     iter->contents_scale(),
+                     pile_);
+        quadSink->Append(quad.PassAs<DrawQuad>(), appendQuadsData);
+        break;
+      }
       case ManagedTileState::DrawingInfo::SOLID_COLOR_MODE: {
         scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
         quad->SetNew(sharedQuadState,
@@ -199,8 +225,6 @@ void PictureLayerImpl::AppendQuads(QuadSink* quadSink,
       }
       case ManagedTileState::DrawingInfo::TRANSPARENT_MODE:
         break;
-      case ManagedTileState::DrawingInfo::PICTURE_PILE_MODE:
-        // TODO: crbug.com/173011 would fill this part in.
       default:
         NOTREACHED();
     }