Revert of Add OpenGL context to Viewer. (patchset #7 id:120001 of https://codereview.chromium.org/1978573003/ )

Reason for revert:
sk_app/WindowContext.cpp is missing. Need to add file and resubmit.

Original issue's description:
> Add OpenGL context to Viewer.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1978573003
>
> Committed: https://skia.googlesource.com/skia/+/56a11e4d6f3d436a3c2497c9c9e71a117d78a93f

TBR=brianosman@google.com,bsalomon@google.com,djsollen@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review-Url: https://codereview.chromium.org/1990893002

1 files changed, 0 insertions, 112 deletions

diff --git a/tools/viewer/sk_app/GLWindowContext.cpp b/tools/viewer/sk_app/GLWindowContext.cpp
deleted file mode 100644
index a491321a2a..0000000000
--- a/tools/viewer/sk_app/GLWindowContext.cpp
+++ /dev/null
@@ -1,112 +0,0 @@
-
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrContext.h"
-#include "SkSurface.h"
-#include "GLWindowContext.h"
-
-#include "gl/GrGLDefines.h"
-
-#include "gl/GrGLUtil.h"
-#include "GrRenderTarget.h"
-#include "GrContext.h"
-
-#include "SkCanvas.h"
-#include "SkImage_Base.h"
-
-namespace sk_app {
-
-GLWindowContext::GLWindowContext(void* platformData, const DisplayParams& params) 
-    : WindowContext()
-    , fBackendContext(nullptr)
-    , fRenderTarget(nullptr)
-    , fSurface(nullptr) {
-}
-
-void GLWindowContext::initializeContext(void* platformData, const DisplayParams& params) {
-
-    this->onInitializeContext(platformData, params);
-
-    fDisplayParams = params;
-
-    SkAutoTUnref<const GrGLInterface> glInterface;
-    glInterface.reset(GrGLCreateNativeInterface());
-    fBackendContext.reset(GrGLInterfaceRemoveNVPR(glInterface.get()));
-
-    SkASSERT(nullptr == fContext);
-    fContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)fBackendContext.get());
-
-    // We may not have real sRGB support (ANGLE, in particular), so check for
-    // that, and fall back to L32:
-    //
-    // ... and, if we're using a 10-bit/channel FB0, it doesn't do sRGB conversion on write,
-    // so pretend that it's non-sRGB 8888:
-    fPixelConfig = fContext->caps()->srgbSupport() &&
-                   SkColorAndProfileAreGammaCorrect(fDisplayParams.fColorType,
-                                                    fDisplayParams.fProfileType) &&
-                   (fColorBits != 30) ? kSkiaGamma8888_GrPixelConfig : kSkia8888_GrPixelConfig;
-}
-
-void GLWindowContext::destroyContext() {
-    fSurface.reset(nullptr);
-    fRenderTarget.reset(nullptr);
-
-    if (fContext) {
-        // in case we have outstanding refs to this guy (lua?)
-        fContext->abandonContext();
-        fContext->unref();
-        fContext = nullptr;
-    }
-    
-    fBackendContext.reset(nullptr);
-
-    this->onDestroyContext();
-}
-
-sk_sp<SkSurface> GLWindowContext::getBackbufferSurface() {
-    if (nullptr == fSurface) {
-        fActualColorBits = SkTMax(fColorBits, 24);
-
-        if (fContext) {
-            GrBackendRenderTargetDesc desc;
-            desc.fWidth = this->fWidth;
-            desc.fHeight = this->fHeight;
-            desc.fConfig = fPixelConfig;
-            desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
-            desc.fSampleCnt = fSampleCount;
-            desc.fStencilBits = fStencilBits;
-            GrGLint buffer;
-            GR_GL_CALL(fBackendContext, GetIntegerv(GR_GL_FRAMEBUFFER_BINDING, &buffer));
-            desc.fRenderTargetHandle = buffer;
-            fRenderTarget.reset(fContext->textureProvider()->wrapBackendRenderTarget(desc));
-
-            fSurface = this->createRenderSurface(fRenderTarget, fActualColorBits);
-        }
-    }
-
-    return fSurface;
-}
-
-void GLWindowContext::swapBuffers() {
-    this->presentRenderSurface(fSurface, fRenderTarget, fActualColorBits);
-    this->onSwapBuffers();
-}
-
-void GLWindowContext::resize(uint32_t w, uint32_t h) {
-    this->destroyContext();
-
-    this->initializeContext(nullptr, fDisplayParams);
-}
-
-void GLWindowContext::setDisplayParams(const DisplayParams& params) {
-    this->destroyContext();
-
-    this->initializeContext(nullptr, params);
-}
-
-}   //namespace sk_app