chrome/android: Update toolbar drawing in native.

ui/android/resources/nine_patch_resource.cc

Index: ui/android/resources/nine_patch_resource.cc
diff --git a/ui/android/resources/nine_patch_resource.cc b/ui/android/resources/nine_patch_resource.cc
index cf8055dd40c02741cabd49f5f0faecbcc03a2ec9..a63d3752ddd25ed19fd66ec0fb72aafabaa5fa05 100644
--- a/ui/android/resources/nine_patch_resource.cc
+++ b/ui/android/resources/nine_patch_resource.cc
@@ -5,6 +5,8 @@
 #include "ui/android/resources/nine_patch_resource.h"
 
 #include "base/memory/ptr_util.h"
+#include "cc/layers/nine_patch_layer.h"
+#include "ui/gfx/geometry/point_f.h"
 
 namespace ui {
 
@@ -21,6 +23,28 @@ NinePatchResource::NinePatchResource(gfx::Rect padding, gfx::Rect aperture)
 
 NinePatchResource::~NinePatchResource() = default;
 
+void NinePatchResource::UpdateNinePatchLayer(

[mdjones, 2017/03/16 21:01:48]

This feels like something that should either be static or on the NinePatchLayer
itself. It looks like you would just need to add a getter for padding on this
class.

[Khushal, 2017/03/17 23:02:58]

The getter is already public. This was supposed to be more of a helper method
for not redoing the math for size/position all over the place. I think I'll just
add 2 methods for getting the draw size and position instead, to mirror Border.
The rest of it can stay where it was.

+    cc::NinePatchLayer* layer,
+    const gfx::Rect& content_location) const {
+  // The effective drawing size of the layer includes the size of the content
+  // (fit inside the expanded padding area) and the size of the margins on each
+  // side.
+  gfx::Size draw_size(
+      content_location.width() + size().width() - padding_.width(),
+      content_location.height() + size().height() - padding_.height());
+  gfx::Rect border(Border(draw_size));
+  // Offset the location of the layer by the amount taken by the left and top
+  // margin.
+  gfx::PointF position(content_location.x() - padding_.x(),
+                       content_location.y() - padding_.y());
+
+  layer->SetBounds(draw_size);
+  layer->SetPosition(position);
+  layer->SetBorder(border);
+  layer->SetAperture(aperture_);
+  layer->SetUIResourceId(ui_resource()->id());
+}
+
 gfx::Rect NinePatchResource::Border(const gfx::Size& bounds) const {
   return Border(bounds, gfx::InsetsF(1.f, 1.f, 1.f, 1.f));
 }