gfx: Add an implicit Insets to InsetsF conversion operator.

ui/gfx/geometry/insets.h

Index: ui/gfx/geometry/insets.h
diff --git a/ui/gfx/geometry/insets.h b/ui/gfx/geometry/insets.h
index 94fb2ef3bdc4a763cce94ff473bebd81be7e7c85..d9eaed4124cab3b79fea11bfdc29e424fe85ea44 100644
--- a/ui/gfx/geometry/insets.h
+++ b/ui/gfx/geometry/insets.h
@@ -9,6 +9,7 @@
 
 #include "build/build_config.h"
 #include "ui/gfx/geometry/insets_base.h"
+#include "ui/gfx/geometry/insets_f.h"
 #include "ui/gfx/gfx_export.h"
 
 #if defined(TOOLKIT_GTK)
@@ -39,6 +40,10 @@ class GFX_EXPORT Insets : public InsetsBase<Insets, int> {
                   static_cast<int>(right() * x_scale));
   }
 
+  operator InsetsF() const {
+    return InsetsF(top(), left(), bottom(), right());
+  }
+
   // Returns a string representation of the insets.
   std::string ToString() const;
 };