Revert of Use the GrCacheable ID to eliminate the need for notifications to GrGpuGL when textures and RTs are… (https://codereview.chromium.org/376703009/)

Reason for revert:
Trying to unblock roll wedged on 64 bit intrinsic call on XP

Original issue's description:
> Use the GrCacheable ID to eliminate the need for notifications to GrGpuGL when textures and RTs are deleted.
>
> Also, rename GrCacheable::getGenerationID() to getInstanceID() since it doesn't behave like other "generation" IDs.
>
> Committed: https://skia.googlesource.com/skia/+/91bdbcdbbdf5cdf0fdb4518a0d30206c964cfdf6

R=jvanverth@google.com, bsalomon@google.com
TBR=bsalomon@google.com, jvanverth@google.com
NOTREECHECKS=true
NOTRY=true

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/405023003
diff --git a/src/gpu/GrBitmapTextContext.cpp b/src/gpu/GrBitmapTextContext.cpp
index 78b6174..25c13ec 100755
--- a/src/gpu/GrBitmapTextContext.cpp
+++ b/src/gpu/GrBitmapTextContext.cpp
@@ -56,7 +56,7 @@
 
     fCurrTexture = NULL;
     fCurrVertex = 0;
-    fEffectTextureInstanceID = 0;
+    fEffectTextureGenID = 0;
 
     fVertices = NULL;
     fMaxVertices = 0;
@@ -94,11 +94,11 @@
         SkASSERT(fCurrTexture);
         GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kNone_FilterMode);
 
-        uint64_t textureInstanceID = fCurrTexture->getInstanceID();
+        uint32_t textureGenID = fCurrTexture->getGenerationID();
         
-        if (textureInstanceID != fEffectTextureInstanceID) {
+        if (textureGenID != fEffectTextureGenID) {
             fCachedEffect.reset(GrCustomCoordsTextureEffect::Create(fCurrTexture, params));
-            fEffectTextureInstanceID = textureInstanceID;
+            fEffectTextureGenID = textureGenID;
         }
 
         // This effect could be stored with one of the cache objects (atlas?)