diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/gpu/gl/win/SkNativeGLContext_win.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/gpu/gl/win/SkNativeGLContext_win.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,121 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "gl/SkNativeGLContext.h"
+#include "SkWGL.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
+    fOldHGLRC = wglGetCurrentContext();
+    fOldHDC = wglGetCurrentDC();
+}
+
+SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
+    wglMakeCurrent(fOldHDC, fOldHGLRC);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+ATOM SkNativeGLContext::gWC = 0;
+
+SkNativeGLContext::SkNativeGLContext()
+    : fWindow(NULL)
+    , fDeviceContext(NULL)
+    , fGlRenderContext(0) {
+}
+
+SkNativeGLContext::~SkNativeGLContext() {
+    this->destroyGLContext();
+}
+
+void SkNativeGLContext::destroyGLContext() {
+    if (fGlRenderContext) {
+        wglDeleteContext(fGlRenderContext);
+    }
+    if (fWindow && fDeviceContext) {
+        ReleaseDC(fWindow, fDeviceContext);
+    }
+    if (fWindow) {
+        DestroyWindow(fWindow);
+    }
+}
+
+const GrGLInterface* SkNativeGLContext::createGLContext() {
+    HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(NULL);
+
+    if (!gWC) {
+        WNDCLASS wc;
+        wc.cbClsExtra = 0;
+        wc.cbWndExtra = 0;
+        wc.hbrBackground = NULL;
+        wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+        wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
+        wc.hInstance = hInstance;
+        wc.lpfnWndProc = (WNDPROC) DefWindowProc;
+        wc.lpszClassName = TEXT("Griffin");
+        wc.lpszMenuName = NULL;
+        wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+
+        gWC = RegisterClass(&wc);
+        if (!gWC) {
+            SkDebugf("Could not register window class.\n");
+            return NULL;
+        }
+    }
+
+    if (!(fWindow = CreateWindow(TEXT("Griffin"),
+                                 TEXT("The Invisible Man"),
+                                 WS_OVERLAPPEDWINDOW,
+                                 0, 0, 1, 1,
+                                 NULL, NULL,
+                                 hInstance, NULL))) {
+        SkDebugf("Could not create window.\n");
+        return NULL;
+    }
+
+    if (!(fDeviceContext = GetDC(fWindow))) {
+        SkDebugf("Could not get device context.\n");
+        this->destroyGLContext();
+        return NULL;
+    }
+
+    // Requesting a Core profile would bar us from using NVPR. So we pass false.
+    if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, false))) {
+        SkDebugf("Could not create rendering context.\n");
+        this->destroyGLContext();
+        return NULL;
+    }
+
+    if (!(wglMakeCurrent(fDeviceContext, fGlRenderContext))) {
+        SkDebugf("Could not set the context.\n");
+        this->destroyGLContext();
+        return NULL;
+    }
+    const GrGLInterface* interface = GrGLCreateNativeInterface();
+    if (NULL == interface) {
+        SkDebugf("Could not create GL interface.\n");
+        this->destroyGLContext();
+        return NULL;
+    }
+
+    return interface;
+}
+
+void SkNativeGLContext::makeCurrent() const {
+    if (!wglMakeCurrent(fDeviceContext, fGlRenderContext)) {
+        SkDebugf("Could not create rendering context.\n");
+    }
+}
+
+void SkNativeGLContext::swapBuffers() const {
+    if (!SwapBuffers(fDeviceContext)) {
+        SkDebugf("Could not complete SwapBuffers.\n");
+    }
+}