Move SkGLContext and some GrGLInterface implementations to skgputest module

tools/gpu/gl/win/CreatePlatformGLContext_win.cpp

Index: tools/gpu/gl/win/CreatePlatformGLContext_win.cpp
diff --git a/src/gpu/gl/win/SkCreatePlatformGLContext_win.cpp b/tools/gpu/gl/win/CreatePlatformGLContext_win.cpp
similarity index 94%
rename from src/gpu/gl/win/SkCreatePlatformGLContext_win.cpp
rename to tools/gpu/gl/win/CreatePlatformGLContext_win.cpp
index da13ee739ea825431457fed9056fceb2246af894..efee28b74b1281c5b1ddda1de8a582d14aa22c32 100644
--- a/src/gpu/gl/win/SkCreatePlatformGLContext_win.cpp
+++ b/tools/gpu/gl/win/CreatePlatformGLContext_win.cpp
@@ -6,7 +6,7 @@
  * found in the LICENSE file.
  */
 
-#include "gl/SkGLContext.h"
+#include "gl/GLContext.h"
 
 #include <windows.h>
 #include <GL/GL.h>
@@ -17,7 +17,7 @@
 
 namespace {
 
-class WinGLContext : public SkGLContext {
+class WinGLContext : public sk_gpu_test::GLContext {
 public:
     WinGLContext(GrGLStandard forcedGpuAPI);
 	~WinGLContext() override;
@@ -187,16 +187,18 @@ GrGLFuncPtr WinGLContext::onPlatformGetProcAddress(const char* name) const {
 
 } // anonymous namespace
 
-SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* shareContext) {
+namespace sk_gpu_test {
+GLContext* CreatePlatformGLContext(GrGLStandard forcedGpuAPI, GLContext *shareContext) {
     SkASSERT(!shareContext);
     if (shareContext) {
         return nullptr;
     }
-    WinGLContext* ctx = new WinGLContext(forcedGpuAPI);
+    WinGLContext *ctx = new WinGLContext(forcedGpuAPI);
     if (!ctx->isValid()) {
         delete ctx;
         return nullptr;
     }
     return ctx;
 }
+}  // namespace sk_gpu_test