Make GrGLInterface a per-GrContext refcounted object rather than a global

Review URL: http://codereview.appspot.com/4901046/



git-svn-id: http://skia.googlecode.com/svn/trunk@2140 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrGLRenderTarget.cpp b/gpu/src/GrGLRenderTarget.cpp
index ccfc55a..290ae2e 100644
--- a/gpu/src/GrGLRenderTarget.cpp
+++ b/gpu/src/GrGLRenderTarget.cpp
@@ -13,6 +13,8 @@
 
 #define GPUGL static_cast<GrGpuGL*>(getGpu())
 
+#define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X)
+
 void GrGLRenderTarget::init(const Desc& desc,
                             const GrGLIRect& viewport,
                             GrGLTexID* texID) {
@@ -64,13 +66,13 @@
     GPUGL->notifyRenderTargetDelete(this);
     if (fOwnIDs) {
         if (fTexFBOID) {
-            GR_GL(DeleteFramebuffers(1, &fTexFBOID));
+            GL_CALL(DeleteFramebuffers(1, &fTexFBOID));
         }
         if (fRTFBOID && fRTFBOID != fTexFBOID) {
-            GR_GL(DeleteFramebuffers(1, &fRTFBOID));
+            GL_CALL(DeleteFramebuffers(1, &fRTFBOID));
         }
         if (fMSColorRenderbufferID) {
-            GR_GL(DeleteRenderbuffers(1, &fMSColorRenderbufferID));
+            GL_CALL(DeleteRenderbuffers(1, &fMSColorRenderbufferID));
         }
     }
     fRTFBOID                = 0;