Properly fix border issues

- don't process non-client calcsize/paint
- do proper DPI calculations when DPI > 100%

Auditors: @bbondy, @darkdh

Fixes brave/browser-laptop#6258

Reverts 182fe6d
Which I believe incorrectly fixed the problem with Chromium 53
(see discussion at electron/electron#7416 for more info)

We need to test to confirm, but I believe this change will fix:
brave/browser-laptop#4502
brave/browser-laptop#6462
brave/browser-laptop#6468
brave/browser-laptop#6481

atom/browser/native_window_views.cc

@@ -1168,6 +1168,9 @@ void NativeWindowViews::OnWidgetMove() {
 
 gfx::Rect NativeWindowViews::ContentBoundsToWindowBounds(
     const gfx::Rect& bounds) {
+  if (!has_frame())
+    return bounds;
+
   gfx::Rect window_bounds(bounds);
 #if defined(OS_WIN)
   HWND hwnd = GetAcceleratedWidget();
@@ -1177,7 +1180,7 @@ gfx::Rect NativeWindowViews::ContentBoundsToWindowBounds(
       window_->non_client_view()->GetWindowBoundsForClientBounds(dpi_bounds));
 #endif
 
-  if (has_frame() && menu_bar_ && menu_bar_visible_) {
+  if (menu_bar_ && menu_bar_visible_) {
     window_bounds.set_y(window_bounds.y() - kMenuBarHeight);
     window_bounds.set_height(window_bounds.height() + kMenuBarHeight);
   }
@@ -1186,6 +1189,9 @@ gfx::Rect NativeWindowViews::ContentBoundsToWindowBounds(
 
 gfx::Rect NativeWindowViews::WindowBoundsToContentBounds(
     const gfx::Rect& bounds) {
+  if (!has_frame())
+    return bounds;
+
   gfx::Rect content_bounds(bounds);
 #if defined(OS_WIN)
   HWND hwnd = GetAcceleratedWidget();
@@ -1202,7 +1208,7 @@ gfx::Rect NativeWindowViews::WindowBoundsToContentBounds(
       display::win::ScreenWin::ScreenToDIPSize(hwnd, content_bounds.size()));
 #endif
 
-  if (has_frame() && menu_bar_ && menu_bar_visible_) {
+  if (menu_bar_ && menu_bar_visible_) {
     content_bounds.set_y(content_bounds.y() + kMenuBarHeight);
     content_bounds.set_height(content_bounds.height() - kMenuBarHeight);
   }

atom/browser/native_window_views_win.cc

@@ -130,6 +130,18 @@ bool NativeWindowViews::PreHandleMSG(
       }
       return false;
     }
+    /** Return zero (no-op) for non-client area events when window is frameless.
+     *  \see WM_NCPAINT - https://msdn.microsoft.com/en-us/library/windows/desktop/dd145212(v=vs.85).aspx
+     *  \see WM_NCCALCSIZE - https://msdn.microsoft.com/en-us/library/windows/desktop/ms632634(v=vs.85).aspx
+     */
+    case WM_NCPAINT:
+    case WM_NCCALCSIZE: {
+      if (!has_frame()) {
+        *result = 0;
+        return true;
+      }
+      return false;
+    }
     default:
       return false;
   }

atom/browser/ui/views/menu_layout.cc

@@ -6,20 +6,25 @@
 
 #if defined(OS_WIN)
 #include "atom/browser/native_window_views.h"
+#include "ui/display/win/screen_win.h"
 #endif
 
 namespace atom {
 
 namespace {
 
 #if defined(OS_WIN)
-gfx::Rect SubstractBorderSize(gfx::Rect bounds) {
-  int border_width = GetSystemMetrics(SM_CXSIZEFRAME) - 1;
-  int border_height = GetSystemMetrics(SM_CYSIZEFRAME) - 1;
-  bounds.set_x(bounds.x() + border_width);
-  bounds.set_y(bounds.y() + border_height);
-  bounds.set_width(bounds.width() - 2 * border_width);
-  bounds.set_height(bounds.height() - 2 * border_height);
+gfx::Rect SubtractBorderSize(gfx::Rect bounds) {
+  gfx::Point borderSize = gfx::Point(
+    GetSystemMetrics(SM_CXSIZEFRAME) - 1, // width
+    GetSystemMetrics(SM_CYSIZEFRAME) - 1  // height
+  );
+  gfx::Point dpiAdjustedSize = display::win::ScreenWin::ScreenToDIPPoint(borderSize);
+
+  bounds.set_x(bounds.x() + dpiAdjustedSize.x());
+  bounds.set_y(bounds.y() + dpiAdjustedSize.y());
+  bounds.set_width(bounds.width() - 2 * dpiAdjustedSize.x());
+  bounds.set_height(bounds.height() - 2 * dpiAdjustedSize.y());
   return bounds;
 }
 #endif
@@ -39,7 +44,7 @@ void MenuLayout::Layout(views::View* host) {
   // Reserve border space for maximized frameless window so we won't have the
   // content go outside of screen.
   if (!window_->has_frame() && window_->IsMaximized()) {
-    gfx::Rect bounds = SubstractBorderSize(host->GetContentsBounds());
+    gfx::Rect bounds = SubtractBorderSize(host->GetContentsBounds());
     host->child_at(0)->SetBoundsRect(bounds);
     return;
   }

atom/browser/ui/win/atom_desktop_window_tree_host_win.cc

@@ -28,12 +28,4 @@ bool AtomDesktopWindowTreeHostWin::PreHandleMSG(
   return delegate_->PreHandleMSG(message, w_param, l_param, result);
 }
 
-/** Override the client area inset
- *  Returning true forces a border of 0 for frameless windows
- */
-bool AtomDesktopWindowTreeHostWin::GetClientAreaInsets(
-    gfx::Insets* insets) const {
-  return !HasFrame();
-}
-
 }  // namespace atom

atom/browser/ui/win/atom_desktop_window_tree_host_win.h

@@ -27,7 +27,6 @@ class AtomDesktopWindowTreeHostWin : public views::DesktopWindowTreeHostWin {
  protected:
   bool PreHandleMSG(
       UINT message, WPARAM w_param, LPARAM l_param, LRESULT* result) override;
-  bool GetClientAreaInsets(gfx::Insets* insets) const override;
 
  private:
   MessageHandlerDelegate* delegate_;  // weak ref