Revert "Move more internal methods from GrContext to GrContextPriv"

This reverts commit f440cecbfdf1910104f36aedd0e963da2ae8b6a8.

Reason for revert: breaking android builds. 

Original change's description:
> Move more internal methods from GrContext to GrContextPriv
> 
> TBR=bsalomon@google.com
> Change-Id: Ia8cf0e0d30451c69bc7a08215aafa6abe6e0ddbe
> Reviewed-on: https://skia-review.googlesource.com/97080
> Commit-Queue: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com

Change-Id: If263f8161f0fbe3fc6ee8f34bb09e237705c3694
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/97200
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/tests/EGLImageTest.cpp b/tests/EGLImageTest.cpp
index dac78a8..efa7de2 100644
--- a/tests/EGLImageTest.cpp
+++ b/tests/EGLImageTest.cpp
@@ -28,7 +28,7 @@
         glctx1->makeCurrent();
         if (grctx1) {
             if (backendTex1 && backendTex1->isValid()) {
-                GrGLGpu* gpu1 = static_cast<GrGLGpu*>(grctx1->contextPriv().getGpu());
+                GrGLGpu* gpu1 = static_cast<GrGLGpu*>(grctx1->getGpu());
                 gpu1->deleteTestingOnlyBackendTexture(backendTex1);
             }
         }
@@ -53,7 +53,7 @@
     if (kGLES_GrGLStandard != glCtx0->gl()->fStandard) {
         return;
     }
-    GrGLGpu* gpu0 = static_cast<GrGLGpu*>(context0->contextPriv().getGpu());
+    GrGLGpu* gpu0 = static_cast<GrGLGpu*>(context0->getGpu());
     if (!gpu0->glCaps().shaderCaps()->externalTextureSupport()) {
         return;
     }
@@ -83,7 +83,7 @@
 
     // Use GL Context 1 to create a texture unknown to GrContext.
     context1->flush();
-    GrGpu* gpu1 = context1->contextPriv().getGpu();
+    GrGpu* gpu1 = context1->getGpu();
     static const int kSize = 100;
     backendTexture1 =
         gpu1->createTestingOnlyBackendTexture(nullptr, kSize, kSize, kRGBA_8888_GrPixelConfig,