cc: Implement DelegatingRender::drawFrame() method.

cc/layer_tree_host_impl.cc

 // Copyright 2011 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/layer_tree_host_impl.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/debug/trace_event.h"
@@ skipping 742 matching lines @@
     m_renderer->receiveCompositorFrameAck(ack);
 }
 
 void LayerTreeHostImpl::OnCanDrawStateChangedForTree(LayerTreeImpl*)
 {
     m_client->onCanDrawStateChanged(canDraw());
 }
 
 CompositorFrameMetadata LayerTreeHostImpl::makeCompositorFrameMetadata() const
 {
-    if (!rootScrollLayer())
-        return CompositorFrameMetadata();
-
     CompositorFrameMetadata metadata;
-    metadata.root_scroll_offset = rootScrollLayer()->scrollOffset() + rootScrollLayer()->scrollDelta();
-    if (!m_settings.pageScalePinchZoomEnabled)
-        metadata.root_scroll_offset.Scale(1 / m_pinchZoomViewport.page_scale_factor());
     metadata.page_scale_factor = m_pinchZoomViewport.total_page_scale_factor();
     metadata.viewport_size = m_pinchZoomViewport.Bounds().size();
     metadata.root_layer_size = contentSize();
     metadata.min_page_scale_factor = m_pinchZoomViewport.min_page_scale_factor();
     metadata.max_page_scale_factor = m_pinchZoomViewport.max_page_scale_factor();
 
+    if (!rootScrollLayer())
+      return metadata;
+
+    metadata.root_scroll_offset = rootScrollLayer()->scrollOffset() + rootScrollLayer()->scrollDelta();
+    if (!m_settings.pageScalePinchZoomEnabled)
+        metadata.root_scroll_offset.Scale(1 / m_pinchZoomViewport.page_scale_factor());
+
     return metadata;
 }
 
 void LayerTreeHostImpl::drawLayers(FrameData& frame)
 {
     TRACE_EVENT0("cc", "LayerTreeHostImpl::drawLayers");
     DCHECK(canDraw());
     DCHECK(!frame.renderPasses.empty());
 
     // FIXME: use the frame begin time from the overall compositor scheduler.
@@ skipping 194 matching lines @@
         return false;
 
     scoped_ptr<ResourceProvider> resourceProvider = ResourceProvider::create(outputSurface.get());
     if (!resourceProvider)
         return false;
 
     if (m_settings.implSidePainting)
       m_tileManager.reset(new TileManager(this, resourceProvider.get(), m_settings.numRasterThreads));
 
     if (outputSurface->Capabilities().has_parent_compositor)
-        m_renderer = DelegatingRenderer::Create(this, resourceProvider.get());
+        m_renderer = DelegatingRenderer::Create(this, outputSurface.get(), resourceProvider.get());
     else if (outputSurface->Context3D())
         m_renderer = GLRenderer::create(this, outputSurface.get(), resourceProvider.get());
     else if (outputSurface->SoftwareDevice())
         m_renderer = SoftwareRenderer::create(this, resourceProvider.get(), outputSurface->SoftwareDevice());
     if (!m_renderer)
         return false;
 
     setNeedsUpdateDrawProperties();
     m_resourceProvider = resourceProvider.Pass();
     m_outputSurface = outputSurface.Pass();
@@ skipping 638 matching lines @@
 }
 
 skia::RefPtr<SkPicture> LayerTreeHostImpl::capturePicture()
 {
     LayerTreeImpl* tree = pendingTree() ? pendingTree() : activeTree();
     LayerImpl* layer = getNonCompositedContentLayerRecursive(tree->RootLayer());
     return layer ? layer->getPicture() : skia::RefPtr<SkPicture>();
 }
 
 }  // namespace cc