Implement a method to access the non-composited content root layer picture pile.

cc/thread_proxy.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/thread_proxy.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "cc/delay_based_time_source.h"
 #include "cc/draw_quad.h"
@@ skipping 1001 matching lines @@
     return commitPendingRequest.commitPending;
 }
 
 void ThreadProxy::commitPendingOnImplThreadForTesting(CommitPendingRequest* request)
 {
     DCHECK(isImplThread());
     request->commitPending = m_schedulerOnImplThread->commitPending();
     request->completion.signal();
 }
 
+skia::RefPtr<SkPicture> ThreadProxy::capturePicture()
+{
+    DCHECK(isMainThread());
+    CompletionEvent completion;
+    skia::RefPtr<SkPicture> picture;
+    {
+        DebugScopedSetMainThreadBlocked mainThreadBlocked(this);
+        Proxy::implThread()->postTask(base::Bind(&ThreadProxy::capturePictureOnImplThread,
+                                                 m_implThreadWeakPtr,
+                                                 &completion,
+                                                 &picture));
+        completion.wait();
+    }
+    return picture;
+}
+
+void ThreadProxy::capturePictureOnImplThread(CompletionEvent* completion, skia::RefPtr<SkPicture>* picture)
+{
+    DCHECK(isImplThread());
+    *picture = m_layerTreeHostImpl->capturePicture();
+    completion->signal();
+}
+
 }  // namespace cc