Plumb physical backing size from RWHV to renderer CC.

content/renderer/render_widget_fullscreen_pepper.cc

Index: content/renderer/render_widget_fullscreen_pepper.cc
diff --git a/content/renderer/render_widget_fullscreen_pepper.cc b/content/renderer/render_widget_fullscreen_pepper.cc
index c1cba49147252be613660999230350eff3597404..3154bbbda7b6c14e0c3b2621ca6c5c04daa8be93 100644
--- a/content/renderer/render_widget_fullscreen_pepper.cc
+++ b/content/renderer/render_widget_fullscreen_pepper.cc
@@ -519,15 +519,18 @@ RenderWidgetFullscreenPepper::GetBitmapForOptimizedPluginPaint(
 }
 
 void RenderWidgetFullscreenPepper::OnResize(const gfx::Size& size,
-                                            const gfx::Rect& resizer_rect,
-                                            bool is_fullscreen) {
+    const gfx::Size& physical_backing_size,
+    const gfx::Rect& resizer_rect,
+    bool is_fullscreen) {
   if (context_) {
-    gfx::Size pixel_size = gfx::ToFlooredSize(
-        gfx::ScaleSize(size, deviceScaleFactor()));
-    context_->reshape(pixel_size.width(), pixel_size.height());
-    context_->viewport(0, 0, pixel_size.width(), pixel_size.height());
-  }
-  RenderWidget::OnResize(size, resizer_rect, is_fullscreen);
+    context_->reshape(physical_backing_size.width(),
+                      physical_backing_size.height());
+    context_->viewport(0, 0,
+                       physical_backing_size.width(),
+                       physical_backing_size.height());
+  }
+  RenderWidget::OnResize(size, physical_backing_size, resizer_rect,
+                         is_fullscreen);
 }
 
 WebWidget* RenderWidgetFullscreenPepper::CreateWebWidget() {