Remove origin field from GrSurface (take 2)

This mainly consists of rm origin from GrSurface and the wrapBackEnd*
methods and then re-adding an explicit origin parameter to all the
GrGpu methods that need it.

TBR=bsalomon@google.com

Change-Id: I4248b2a4749ef844da4233ce53b0dc504bc9eb74
Reviewed-on: https://skia-review.googlesource.com/30280
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/tests/ProxyTest.cpp b/tests/ProxyTest.cpp
index a9b4643..453cb5e 100644
--- a/tests/ProxyTest.cpp
+++ b/tests/ProxyTest.cpp
@@ -63,7 +63,6 @@
         REPORTER_ASSERT(reporter, rtProxy->uniqueID().asUInt() != rt->uniqueID().asUInt());
     }
 
-    REPORTER_ASSERT(reporter, rt->origin() == rtProxy->origin());
     if (SkBackingFit::kExact == fit) {
         REPORTER_ASSERT(reporter, rt->width() == rtProxy->width());
         REPORTER_ASSERT(reporter, rt->height() == rtProxy->height());
@@ -98,7 +97,6 @@
         REPORTER_ASSERT(reporter, texProxy->uniqueID().asUInt() != tex->uniqueID().asUInt());
     }
 
-    REPORTER_ASSERT(reporter, tex->origin() == texProxy->origin());
     if (SkBackingFit::kExact == fit) {
         REPORTER_ASSERT(reporter, tex->width() == texProxy->width());
         REPORTER_ASSERT(reporter, tex->height() == texProxy->height());
@@ -234,7 +232,7 @@
                                                         config, fboInfo);
 
                         sk_sp<GrRenderTarget> defaultFBO(
-                            provider->wrapBackendRenderTarget(backendRT, origin));
+                            provider->wrapBackendRenderTarget(backendRT));
 
                         sk_sp<GrSurfaceProxy> sProxy(GrSurfaceProxy::MakeWrapped(defaultFBO,
                                                                                  origin));