[Experimental, WIP] Demo version of extracting WebView selection data from CompositorFrame.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
@@ skipping 1152 matching lines @@
   legacy_render_widget_host_HWND_ = NULL;
   legacy_window_destroyed_ = true;
 }
 #endif
 
 void RenderWidgetHostViewAura::OnSwapCompositorFrame(
     uint32 output_surface_id,
     scoped_ptr<cc::CompositorFrame> frame) {
   TRACE_EVENT0("content", "RenderWidgetHostViewAura::OnSwapCompositorFrame");
 
+  if (!focused_node_is_plugin()) {
+    cc::ViewportSelectionBound start = frame->metadata.selection.start;
+    fprintf(stderr, "wjm: RWHVA::OnSwapCompositorFrame(%p) Window "
+            "edge_top=(%6.1f,%6.1f) edge_bottom=(%6.1f,%6.1f)\n",
+            this, start.edge_top.x(), start.edge_top.y(),
+            start.edge_bottom.x(), start.edge_bottom.y());
+  } else {
+    // This is just to demonstrate when RWHVA *shouldn't* send selection info.
+    fprintf(stderr, "wjm: RWHVA::OnSwapCompositorFrame(%p) - not focused\n",
+            this);
+  }
+
   last_scroll_offset_ = frame->metadata.root_scroll_offset;
   if (frame->delegated_frame_data) {
     delegated_frame_host_->SwapDelegatedFrame(
         output_surface_id,
         frame->delegated_frame_data.Pass(),
         frame->metadata.device_scale_factor,
         frame->metadata.latency_info);
     return;
   }
 
@@ skipping 1617 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content