bring up SDL on windows

BUG=skia:

patch from issue 1432353002 at patchset 1 (http://crrev.com/1432353002#ps1)

Review URL: https://codereview.chromium.org/1438003004
diff --git a/gyp/views.gyp b/gyp/views.gyp
index 1130e66..af0b901 100644
--- a/gyp/views.gyp
+++ b/gyp/views.gyp
@@ -156,6 +156,10 @@
              '../src/views/mac/SkNSView.mm',
              '../src/views/mac/SkOSWindow_Mac.mm',
              '../src/views/mac/skia_mac.mm',
+
+             # win sources
+             '../src/views/win/SkOSWindow_win.cpp',
+             '../src/views/win/skia_win.cpp',
           ],
           'sources': [
             '../src/views/sdl/SkOSWindow_SDL.cpp',
diff --git a/src/views/sdl/SkOSWindow_SDL.cpp b/src/views/sdl/SkOSWindow_SDL.cpp
index bc07745..8ee1e9d 100644
--- a/src/views/sdl/SkOSWindow_SDL.cpp
+++ b/src/views/sdl/SkOSWindow_SDL.cpp
@@ -68,7 +68,7 @@
         handle_error();
         return;
     }
-    this->resize(SkIntToScalar(dm.w), SkIntToScalar(dm.h));
+    this->resize(dm.w, dm.h);
 }
 
 SkOSWindow::~SkOSWindow() {
diff --git a/third_party/libsdl/sdl.gypi b/third_party/libsdl/sdl.gypi
index 6b5df3f..4b3009b 100644
--- a/third_party/libsdl/sdl.gypi
+++ b/third_party/libsdl/sdl.gypi
@@ -39,6 +39,11 @@
             'mac/sdl_mac.gypi',
           ]
         }],
+        ['skia_os == "win"', {
+          'includes': [
+            'win/sdl_win.gypi',
+          ]
+        }],
       ],
     },
   ],
diff --git a/third_party/libsdl/win/README b/third_party/libsdl/win/README
new file mode 100644
index 0000000..605876e
--- /dev/null
+++ b/third_party/libsdl/win/README
@@ -0,0 +1,4 @@
+There is no autogenerated SDL_config.h on windows.  Build using visual
+studio to get the list of files, then use the following command from
+the sdl folder:
+find . -type f -print | fgrep -f <list_of_files>
diff --git a/third_party/libsdl/win/sdl_win.gypi b/third_party/libsdl/win/sdl_win.gypi
new file mode 100644
index 0000000..ad33731
--- /dev/null
+++ b/third_party/libsdl/win/sdl_win.gypi
@@ -0,0 +1,159 @@
+# Copyright 2015 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+# Linux specific files and settings for SDL
+
+{
+ #TODO what is really necessary here
+ 'link_settings': {
+   'libraries': [
+      "-lwinmm",
+      "-limm32",
+      "-lversion",
+   ],
+ },
+ 'sources': [
+   '<(src_dir)/src/joystick/windows/SDL_mmjoystick.c',
+   '<(src_dir)/src/joystick/windows/SDL_xinputjoystick.c',
+   '<(src_dir)/src/joystick/windows/SDL_dinputjoystick.c',
+   '<(src_dir)/src/joystick/windows/SDL_windowsjoystick.c',
+   '<(src_dir)/src/joystick/SDL_joystick.c',
+   '<(src_dir)/src/joystick/SDL_gamecontroller.c',
+   '<(src_dir)/src/SDL_log.c',
+   '<(src_dir)/src/core/windows/SDL_xinput.c',
+   '<(src_dir)/src/core/windows/SDL_windows.c',
+   '<(src_dir)/src/libm/s_fabs.c',
+   '<(src_dir)/src/libm/k_tan.c',
+   '<(src_dir)/src/libm/k_rem_pio2.c',
+   '<(src_dir)/src/libm/s_cos.c',
+   '<(src_dir)/src/libm/s_atan.c',
+   '<(src_dir)/src/libm/s_floor.c',
+   '<(src_dir)/src/libm/e_log.c',
+   '<(src_dir)/src/libm/s_tan.c',
+   '<(src_dir)/src/libm/s_sin.c',
+   '<(src_dir)/src/libm/e_atan2.c',
+   '<(src_dir)/src/libm/e_pow.c',
+   '<(src_dir)/src/libm/s_copysign.c',
+   '<(src_dir)/src/libm/e_rem_pio2.c',
+   '<(src_dir)/src/libm/k_sin.c',
+   '<(src_dir)/src/libm/k_cos.c',
+   '<(src_dir)/src/libm/e_sqrt.c',
+   '<(src_dir)/src/libm/s_scalbn.c',
+   '<(src_dir)/src/events/SDL_dropevents.c',
+   '<(src_dir)/src/events/SDL_touch.c',
+   '<(src_dir)/src/events/SDL_quit.c',
+   '<(src_dir)/src/events/SDL_gesture.c',
+   '<(src_dir)/src/events/SDL_events.c',
+   '<(src_dir)/src/events/SDL_windowevents.c',
+   '<(src_dir)/src/events/SDL_keyboard.c',
+   '<(src_dir)/src/events/SDL_clipboardevents.c',
+   '<(src_dir)/src/events/SDL_mouse.c',
+   '<(src_dir)/src/power/windows/SDL_syspower.c',
+   '<(src_dir)/src/power/SDL_power.c',
+   '<(src_dir)/src/timer/SDL_timer.c',
+   '<(src_dir)/src/timer/windows/SDL_systimer.c',
+   '<(src_dir)/src/dynapi/SDL_dynapi.c',
+   '<(src_dir)/src/SDL_hints.c',
+   '<(src_dir)/src/thread/generic/SDL_syscond.c',
+   '<(src_dir)/src/thread/windows/SDL_systhread.c',
+   '<(src_dir)/src/thread/windows/SDL_syssem.c',
+   '<(src_dir)/src/thread/windows/SDL_sysmutex.c',
+   '<(src_dir)/src/thread/windows/SDL_systls.c',
+   '<(src_dir)/src/thread/SDL_thread.c',
+   '<(src_dir)/src/haptic/windows/SDL_windowshaptic.c',
+   '<(src_dir)/src/haptic/windows/SDL_xinputhaptic.c',
+   '<(src_dir)/src/haptic/windows/SDL_dinputhaptic.c',
+   '<(src_dir)/src/haptic/SDL_haptic.c',
+   '<(src_dir)/src/render/SDL_yuv_mmx.c',
+   '<(src_dir)/src/render/SDL_d3dmath.c',
+   '<(src_dir)/src/render/direct3d/SDL_render_d3d.c',
+   '<(src_dir)/src/render/direct3d11/SDL_render_d3d11.c',
+   '<(src_dir)/src/render/SDL_render.c',
+   '<(src_dir)/src/render/opengl/SDL_render_gl.c',
+   '<(src_dir)/src/render/opengl/SDL_shaders_gl.c',
+   '<(src_dir)/src/render/software/SDL_render_sw.c',
+   '<(src_dir)/src/render/software/SDL_drawline.c',
+   '<(src_dir)/src/render/software/SDL_rotate.c',
+   '<(src_dir)/src/render/software/SDL_blendpoint.c',
+   '<(src_dir)/src/render/software/SDL_drawpoint.c',
+   '<(src_dir)/src/render/software/SDL_blendfillrect.c',
+   '<(src_dir)/src/render/software/SDL_blendline.c',
+   '<(src_dir)/src/render/opengles2/SDL_render_gles2.c',
+   '<(src_dir)/src/render/opengles2/SDL_shaders_gles2.c',
+   '<(src_dir)/src/render/SDL_yuv_sw.c',
+   '<(src_dir)/src/filesystem/windows/SDL_sysfilesystem.c',
+   '<(src_dir)/src/file/SDL_rwops.c',
+   '<(src_dir)/src/stdlib/SDL_getenv.c',
+   '<(src_dir)/src/stdlib/SDL_iconv.c',
+   '<(src_dir)/src/stdlib/SDL_stdlib.c',
+   '<(src_dir)/src/stdlib/SDL_string.c',
+   '<(src_dir)/src/stdlib/SDL_malloc.c',
+   '<(src_dir)/src/stdlib/SDL_qsort.c',
+   '<(src_dir)/src/SDL_assert.c',
+   '<(src_dir)/src/SDL.c',
+   '<(src_dir)/src/atomic/SDL_atomic.c',
+   '<(src_dir)/src/atomic/SDL_spinlock.c',
+   '<(src_dir)/src/loadso/windows/SDL_sysloadso.c',
+   '<(src_dir)/src/audio/dummy/SDL_dummyaudio.c',
+   '<(src_dir)/src/audio/SDL_audiocvt.c',
+   '<(src_dir)/src/audio/SDL_audio.c',
+   '<(src_dir)/src/audio/xaudio2/SDL_xaudio2.c',
+   '<(src_dir)/src/audio/SDL_audiodev.c',
+   '<(src_dir)/src/audio/SDL_audiotypecvt.c',
+   '<(src_dir)/src/audio/disk/SDL_diskaudio.c',
+   '<(src_dir)/src/audio/SDL_wave.c',
+   '<(src_dir)/src/audio/winmm/SDL_winmm.c',
+   '<(src_dir)/src/audio/SDL_mixer.c',
+   '<(src_dir)/src/audio/directsound/SDL_directsound.c',
+   '<(src_dir)/src/cpuinfo/SDL_cpuinfo.c',
+   '<(src_dir)/src/SDL_error.c',
+   '<(src_dir)/src/video/SDL_bmp.c',
+   '<(src_dir)/src/video/dummy/SDL_nullevents.c',
+   '<(src_dir)/src/video/dummy/SDL_nullvideo.c',
+   '<(src_dir)/src/video/dummy/SDL_nullframebuffer.c',
+   '<(src_dir)/src/video/SDL_blit_auto.c',
+   '<(src_dir)/src/video/SDL_shape.c',
+   '<(src_dir)/src/video/SDL_blit_N.c',
+   '<(src_dir)/src/video/windows/SDL_windowsframebuffer.c',
+   '<(src_dir)/src/video/windows/SDL_windowskeyboard.c',
+   '<(src_dir)/src/video/windows/SDL_windowsshape.c',
+   '<(src_dir)/src/video/windows/SDL_windowswindow.c',
+   '<(src_dir)/src/video/windows/SDL_windowsopengl.c',
+   '<(src_dir)/src/video/windows/SDL_windowsvideo.c',
+   '<(src_dir)/src/video/windows/SDL_windowsmessagebox.c',
+   '<(src_dir)/src/video/windows/SDL_windowsopengles.c',
+   '<(src_dir)/src/video/windows/SDL_windowsevents.c',
+   '<(src_dir)/src/video/windows/SDL_windowsmodes.c',
+   '<(src_dir)/src/video/windows/SDL_windowsmouse.c',
+   '<(src_dir)/src/video/windows/SDL_windowsclipboard.c',
+   '<(src_dir)/src/video/SDL_blit_A.c',
+   '<(src_dir)/src/video/SDL_pixels.c',
+   '<(src_dir)/src/video/SDL_rect.c',
+   '<(src_dir)/src/video/SDL_video.c',
+   '<(src_dir)/src/video/SDL_stretch.c',
+   '<(src_dir)/src/video/SDL_surface.c',
+   '<(src_dir)/src/video/SDL_fillrect.c',
+   '<(src_dir)/src/video/SDL_blit_copy.c',
+   '<(src_dir)/src/video/SDL_blit_1.c',
+   '<(src_dir)/src/video/SDL_egl.c',
+   '<(src_dir)/src/video/SDL_RLEaccel.c',
+   '<(src_dir)/src/video/SDL_blit_slow.c',
+   '<(src_dir)/src/video/SDL_blit.c',
+   '<(src_dir)/src/video/SDL_clipboard.c',
+   '<(src_dir)/src/video/SDL_blit_0.c',
+   '<(src_dir)/src/main/windows/SDL_windows_main.c',
+ ],
+ 'defines': [ 
+   '_REENTRANT'
+ ],
+ 'cflags': [
+   '-fPIC',
+   '-O3',
+   '-mmmx',
+   '-m3dnow',
+   '-msse',
+   '-msse2',
+   '-fvisibility=hidden',
+ ],
+}