Have GMs read the GrContext via a setter/getter rather than a global.

gm/texdata.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This test only works with the GPU backend.
 
 #include "gm.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
 #include "effects/GrSimpleTextureEffect.h"
 #include "SkColorPriv.h"
 #include "SkDevice.h"
 
 namespace skiagm {
 
-extern GrContext* GetGr();
-
 static const int S = 200;
 
 class TexDataGM : public GM {
 public:
     TexDataGM() {
         this->setBGColor(0xff000000);
     }
 
 protected:
     virtual SkString onShortName() {
         return SkString("texdata");
     }
 
     virtual SkISize onISize() {
         return make_isize(2*S, 2*S);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         SkBaseDevice* device = canvas->getTopDevice();
         GrRenderTarget* target = device->accessRenderTarget();
-        GrContext* ctx = GetGr();
+        GrContext* ctx = GM::GetGr(canvas);
         if (ctx && target) {
             SkPMColor gTextureData[(2 * S) * (2 * S)];
             static const int stride = 2 * S;
             static const SkPMColor gray  = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
             static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
             static const SkPMColor red   = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
             static const SkPMColor blue  = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
             static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
             static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
             for (int i = 0; i < 2; ++i) {
@@ skipping 85 matching lines @@
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new TexDataGM; }
 static GMRegistry reg(MyFactory);
 
 }
 
 #endif