[Contextual Search] Add a handle to the bar when Chrome Home is enabled

chrome/browser/android/compositor/layer/overlay_panel_layer.cc

Index: chrome/browser/android/compositor/layer/overlay_panel_layer.cc
diff --git a/chrome/browser/android/compositor/layer/overlay_panel_layer.cc b/chrome/browser/android/compositor/layer/overlay_panel_layer.cc
index 42e2a558c91d7de89bc88b273fab23c25072369f..8b40970c336b210cb9b8886d7b1a4438a2c49810 100644
--- a/chrome/browser/android/compositor/layer/overlay_panel_layer.cc
+++ b/chrome/browser/android/compositor/layer/overlay_panel_layer.cc
@@ -47,17 +47,18 @@ void OverlayPanelLayer::AddBarTextLayer(scoped_refptr<cc::Layer> text_layer) {
   text_container_->AddChild(text_layer);
 }
 
-void OverlayPanelLayer::SetResourceIds(
-    int bar_text_resource_id,
-    int panel_shadow_resource_id,
-    int bar_shadow_resource_id,
-    int panel_icon_resource_id,
-    int close_icon_resource_id) {
+void OverlayPanelLayer::SetResourceIds(int bar_text_resource_id,
+                                       int panel_shadow_resource_id,
+                                       int bar_shadow_resource_id,
+                                       int panel_icon_resource_id,
+                                       int close_icon_resource_id,
+                                       int handle_resource_id) {
   bar_text_resource_id_ = bar_text_resource_id;
   panel_shadow_resource_id_ = panel_shadow_resource_id;
   bar_shadow_resource_id_ = bar_shadow_resource_id;
   panel_icon_resource_id_ = panel_icon_resource_id;
   close_icon_resource_id_ = close_icon_resource_id;
+  bar_handle_resource_id_ = handle_resource_id;
 }
 
 void OverlayPanelLayer::SetProperties(
@@ -76,8 +77,9 @@ void OverlayPanelLayer::SetProperties(
     float bar_border_height,
     bool bar_shadow_visible,
     float bar_shadow_opacity,
-    float close_icon_opacity) {
-
+    float close_icon_opacity,
+    float bar_handle_offset_y,
+    float bar_padding_bottom) {
   // Grabs required static resources.
   ui::NinePatchResource* panel_shadow_resource =
       ui::NinePatchResource::From(resource_manager_->GetResource(
@@ -119,6 +121,43 @@ void OverlayPanelLayer::SetProperties(
   bar_background_->SetPosition(gfx::PointF(0.f, bar_top));
 
   // ---------------------------------------------------------------------------
+  // Bar Handle
+  // ---------------------------------------------------------------------------
+
+  float bar_content_top = bar_top;
+  bar_content_height_ = bar_height - bar_padding_bottom;
+
+  if (bar_handle_resource_id_ != 0) {
+    if (bar_handle_ == nullptr) {
+      bar_handle_ = cc::UIResourceLayer::Create();
+      bar_handle_->SetIsDrawable(true);
+      layer_->AddChild(bar_handle_);
+    }
+
+    // Grab the bar handle resource.
+    ui::Resource* bar_handle_resource = resource_manager_->GetResource(
+        ui::ANDROID_RESOURCE_TYPE_STATIC, bar_handle_resource_id_);
+
+    // Center the handle horizontally.
+    float bar_handle_left =
+        (panel_width - bar_handle_resource->size().width()) / 2;
+    float bar_handle_top = bar_top + bar_handle_offset_y;
+
+    bar_handle_->SetUIResourceId(bar_handle_resource->ui_resource()->id());
+    bar_handle_->SetBounds(bar_handle_resource->size());
+    bar_handle_->SetPosition(gfx::PointF(bar_handle_left, bar_handle_top));
+
+    bar_content_top = bar_handle_top + bar_handle_resource->size().height();
+    bar_content_height_ = bar_height - bar_content_top - bar_padding_bottom;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Bar Content Layer
+  // ---------------------------------------------------------------------------
+  bar_content_layer_->SetBounds(gfx::Size(panel_width, bar_content_height_));
+  bar_content_layer_->SetPosition(gfx::PointF(0.f, bar_content_top));
+
+  // ---------------------------------------------------------------------------
   // Bar Text
   // ---------------------------------------------------------------------------
   ui::Resource* bar_text_resource = resource_manager_->GetResource(
@@ -127,7 +166,7 @@ void OverlayPanelLayer::SetProperties(
   if (bar_text_resource) {
     // Centers the text vertically in the Search Bar.
     float bar_padding_top =
-        bar_top + bar_height / 2 - bar_text_resource->size().height() / 2;
+        (bar_content_height_ - bar_text_resource->size().height()) / 2;
     bar_text_->SetUIResourceId(bar_text_resource->ui_resource()->id());
     bar_text_->SetBounds(bar_text_resource->size());
     bar_text_->SetPosition(gfx::PointF(0.f, bar_padding_top));
@@ -154,8 +193,7 @@ void OverlayPanelLayer::SetProperties(
     }
 
     // Centers the Icon vertically in the bar.
-    float icon_y = bar_top + bar_height / 2 -
-        icon_layer->bounds().height() / 2;
+    float icon_y = (bar_content_height_ - icon_layer->bounds().height()) / 2;
 
     icon_layer->SetPosition(gfx::PointF(icon_x, icon_y));
   }
@@ -178,7 +216,7 @@ void OverlayPanelLayer::SetProperties(
 
   // Centers the Close Icon vertically in the bar.
   float close_icon_top =
-      bar_top + bar_height / 2 - close_icon_resource->size().height() / 2;
+      (bar_content_height_ - close_icon_resource->size().height()) / 2;
 
   close_icon_->SetUIResourceId(close_icon_resource->ui_resource()->id());
   close_icon_->SetBounds(close_icon_resource->size());
@@ -255,7 +293,8 @@ OverlayPanelLayer::OverlayPanelLayer(ui::ResourceManager* resource_manager)
       close_icon_(cc::UIResourceLayer::Create()),
       content_container_(cc::SolidColorLayer::Create()),
       text_container_(cc::Layer::Create()),
-      bar_border_(cc::SolidColorLayer::Create()) {
+      bar_border_(cc::SolidColorLayer::Create()),
+      bar_content_layer_(cc::UIResourceLayer::Create()) {
   layer_->SetMasksToBounds(false);
   layer_->SetIsDrawable(true);
 
@@ -269,10 +308,14 @@ OverlayPanelLayer::OverlayPanelLayer(ui::ResourceManager* resource_manager)
   bar_background_->SetBackgroundColor(kBarBackgroundColor);
   layer_->AddChild(bar_background_);
 
+  // Bar Content Layer
+  bar_content_layer_->SetIsDrawable(true);
+  layer_->AddChild(bar_content_layer_);
+
   // Bar Text
   bar_text_->SetIsDrawable(true);
   AddBarTextLayer(bar_text_);
-  layer_->AddChild(text_container_);
+  bar_content_layer_->AddChild(text_container_);
 
   // Panel Icon
   panel_icon_->SetIsDrawable(true);
@@ -282,7 +325,7 @@ OverlayPanelLayer::OverlayPanelLayer(ui::ResourceManager* resource_manager)
 
   // Close Icon
   close_icon_->SetIsDrawable(true);
-  layer_->AddChild(close_icon_);
+  bar_content_layer_->AddChild(close_icon_);
 
   // Content Container
   content_container_->SetIsDrawable(true);