Disabling calls to TexParameteri when the values do not exist on ES2.

src/gpu/gl/GrGLCaps.cpp

Index: src/gpu/gl/GrGLCaps.cpp
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 792f3ed5ba63555bb4305c247531ba6790a571e3..a04c0e728e1c20e7ff9b1438f48b4ecd51d2d786 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -52,6 +52,7 @@ GrGLCaps::GrGLCaps(const GrContextOptions& contextOptions,
     fSRGBWriteControl = false;
     fRGBA8888PixelsOpsAreSlow = false;
     fPartialFBOReadIsSlow = false;
+    fMipMapLevelAndLodControlSupport = false;
 
     fBlitFramebufferSupport = kNone_BlitFramebufferSupport;
 
@@ -246,6 +247,14 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
         }
     }
 
+    if (kGL_GrGLStandard == standard) {
+        fMipMapLevelAndLodControlSupport = true;

[bsalomon, 2016/03/01 21:48:37]

Sorry should have asked this earlier, but does this really go all the way back?
OpenGL 2.1 is sort of our minimum requirement on the desktop side.

[cblume, 2016/03/01 21:53:01]

OpenGL 2.1 supports this, yes.
If you go to the OpenGL 2.1 docs (https://www.opengl.org/sdk/docs/man2/) and
look under glTexParameter
(https://www.opengl.org/sdk/docs/man2/xhtml/glTexParameter.xml) you'll see
"GL_TEXTURE_MIN_LOD, GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL,
GL_TEXTURE_MAX_LEVEL,"

+    } else if (kGLES_GrGLStandard == standard) {
+        if (version >= GR_GL_VER(3,0)) {
+            fMipMapLevelAndLodControlSupport = true;
+        }
+    }
+
 #ifdef SK_BUILD_FOR_WIN
     // We're assuming that on Windows Chromium we're using ANGLE.
     bool isANGLE = kANGLE_GrGLDriver == ctxInfo.driver() ||