Do not try to use GL_texture_rectangle on GL ES

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 c2ace6cd368948d25d60f95b766895dcfd1ce740..3771fc4c0e3e209f9e8dd2affb7d9c77f7138e3d 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -226,13 +226,18 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
         }
     }
 
-    if ((kGL_GrGLStandard == standard && version >= GR_GL_VER(3, 1)) ||
-        ctxInfo.hasExtension("GL_ARB_texture_rectangle")) {
-        // We also require textureSize() support for rectangle 2D samplers which was added in GLSL
-        // 1.40.
-        if (ctxInfo.glslGeneration() >= k140_GrGLSLGeneration) {

[Kimmo Kinnunen, 2016/02/15 07:00:41]

Soo.. doesn't this kind of mean that it is disabled today, too? So what would be
the harm in disabling it the other way?

-            fRectangleTextureSupport = true;
+    if (kGL_GrGLStandard == standard) {
+        if (version >= GR_GL_VER(3, 1) || ctxInfo.hasExtension("GL_ARB_texture_rectangle")) {
+            // We also require textureSize() support for rectangle 2D samplers which was added in
+            // GLSL 1.40.
+            if (ctxInfo.glslGeneration() >= k140_GrGLSLGeneration) {
+                fRectangleTextureSupport = true;
+            }
         }
+    } else {
+        // Command buffer exposes this in GL ES context for Chromium reasons,
+        // but it should not be used. Also, at the time of writing command buffer
+        // lacks TexImage2D support and ANGLE lacks GL ES 3.0 support.
     }
 
     if (kGL_GrGLStandard == standard) {