Canvas capture from inactive tab

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index e02c77031447bd168bd78da1759ae6fdceb488a9..70a5a0ad15a0be00a363613519121f52b7e25fd2 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -667,6 +667,10 @@ bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
     IPC_MESSAGE_HANDLER(ViewHostMsg_OpenDateTimeDialog,
                         OnOpenDateTimeDialog)
 #endif
+    IPC_MESSAGE_HANDLER(FrameHostMsg_IncrementCapturerCount,
+                        OnIncrementCapturerCount)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_DecrementCapturerCount,
+                        OnDecrementCapturerCount)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   render_view_message_source_ = NULL;
@@ -2212,6 +2216,16 @@ void WebContentsImpl::OnMoveValidationMessage(
     delegate_->MoveValidationMessage(this, anchor_in_root_view);
 }
 
+void WebContentsImpl::OnIncrementCapturerCount() {
+  DVLOG(3) << __FUNCTION__;
+  IncrementCapturerCount(gfx::Size());
+}
+
+void WebContentsImpl::OnDecrementCapturerCount() {
+  DVLOG(3) << __FUNCTION__;
+  DecrementCapturerCount();
+}
+
 void WebContentsImpl::DidSendScreenRects(RenderWidgetHostImpl* rwh) {
   if (browser_plugin_embedder_)
     browser_plugin_embedder_->DidSendScreenRects();