Replace overdraw_bottom_height with top_controls_layout_height.

content/browser/devtools/renderer_overrides_handler.cc

Index: content/browser/devtools/renderer_overrides_handler.cc
diff --git a/content/browser/devtools/renderer_overrides_handler.cc b/content/browser/devtools/renderer_overrides_handler.cc
index d700dee9459362adad5459477dd16d4503bf795a..8fe1e9b4946e8849e5db7937f6ce41684cac18a4 100644
--- a/content/browser/devtools/renderer_overrides_handler.cc
+++ b/content/browser/devtools/renderer_overrides_handler.cc
@@ -199,14 +199,10 @@ void RendererOverridesHandler::InnerSwapCompositorFrame() {
   // TODO(vkuzkokov): do not use previous frame metadata.
   cc::CompositorFrameMetadata& metadata = last_compositor_frame_metadata_;
 
-  float page_scale = metadata.page_scale_factor;
   gfx::SizeF viewport_size_dip = gfx::ScaleSize(
-      metadata.scrollable_viewport_size, page_scale);
-
-  float total_bar_height_dip = metadata.location_bar_content_translation.y() +
-                                   metadata.overdraw_bottom_height;
-  gfx::SizeF screen_size_dip(viewport_size_dip.width(),
-                             viewport_size_dip.height() + total_bar_height_dip);
+      metadata.scrollable_viewport_size, metadata.page_scale_factor);
+  gfx::SizeF screen_size_dip = gfx::ScaleSize(view->GetPhysicalBackingSize(),
+                                              1 / metadata.device_scale_factor);
 
   std::string format;
   int quality = kDefaultScreenshotQuality;
@@ -570,6 +566,17 @@ void RendererOverridesHandler::ScreencastFrameCaptured(
   if (metadata.device_scale_factor != 0) {
     base::DictionaryValue* response_metadata = new base::DictionaryValue();
 
+    RenderViewHost* host = GetRenderViewHostImpl();
+    RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+        host->GetView());
+    if (!view)
+      return;
+
+    gfx::SizeF viewport_size_dip = gfx::ScaleSize(
+        metadata.scrollable_viewport_size, metadata.page_scale_factor);
+    gfx::SizeF screen_size_dip = gfx::ScaleSize(
+        view->GetPhysicalBackingSize(), 1 / metadata.device_scale_factor);

[dgozman, 2014/08/19 13:05:47]

Does GetPhysicalBackingSize() change when top controls are shown/hidden?
Screencast code assumes this value doesn't change over time.

[aelias_OOO_until_Jul13, 2014/08/19 21:28:39]

It doesn't change.  GetPhysicalBackingSize returns the physical pixel size of
the application window regardless of top controls and keyboard.

By the way, I locally tested devtools screencasting after applying this patch
and it works fine.

[dgozman, 2014/08/20 04:47:01]

Great! I remember we erroneously called method here which returned variable size
(GetRequestedRendererSize() probably).
Thank you very much! I just wanted to be on the safe side.

+
     response_metadata->SetDouble(
         devtools::Page::ScreencastFrameMetadata::kParamDeviceScaleFactor,
         metadata.device_scale_factor);
@@ -587,7 +594,9 @@ void RendererOverridesHandler::ScreencastFrameCaptured(
         metadata.location_bar_content_translation.y());
     response_metadata->SetDouble(
         devtools::Page::ScreencastFrameMetadata::kParamOffsetBottom,
-        metadata.overdraw_bottom_height);
+        screen_size_dip.height() -
+            metadata.location_bar_content_translation.y() -
+            viewport_size_dip.height());
 
     base::DictionaryValue* viewport = new base::DictionaryValue();
     viewport->SetDouble(devtools::DOM::Rect::kParamX,
@@ -601,16 +610,12 @@ void RendererOverridesHandler::ScreencastFrameCaptured(
     response_metadata->Set(
         devtools::Page::ScreencastFrameMetadata::kParamViewport, viewport);
 
-    gfx::SizeF viewport_size_dip = gfx::ScaleSize(
-        metadata.scrollable_viewport_size, metadata.page_scale_factor);
     response_metadata->SetDouble(
         devtools::Page::ScreencastFrameMetadata::kParamDeviceWidth,
-        viewport_size_dip.width());
+        screen_size_dip.width());
     response_metadata->SetDouble(
         devtools::Page::ScreencastFrameMetadata::kParamDeviceHeight,
-        viewport_size_dip.height() +
-            metadata.location_bar_content_translation.y() +
-            metadata.overdraw_bottom_height);
+        screen_size_dip.height());
     response_metadata->SetDouble(
         devtools::Page::ScreencastFrameMetadata::kParamScrollOffsetX,
         metadata.root_scroll_offset.x());