Rename kES2_GrGLBinding to kES_GrGLBinding. Step 0 for supporting ES3.

src/gpu/gl/GrGpuGL.cpp

Index: src/gpu/gl/GrGpuGL.cpp
diff --git a/src/gpu/gl/GrGpuGL.cpp b/src/gpu/gl/GrGpuGL.cpp
index 5845d7a673ac36c3b267084740ba5505acf8f9e7..64f4dfe9ea41c91f5bb00610037e9ce4b99e53ab 100644
--- a/src/gpu/gl/GrGpuGL.cpp
+++ b/src/gpu/gl/GrGpuGL.cpp
@@ -263,7 +263,7 @@ bool GrGpuGL::canWriteTexturePixels(const GrTexture* texture, GrPixelConfig srcC
     if (kIndex_8_GrPixelConfig == srcConfig || kIndex_8_GrPixelConfig == texture->config()) {
         return false;
     }
-    if (srcConfig != texture->config() && kES2_GrGLBinding == this->glBinding()) {
+    if (srcConfig != texture->config() && kES_GrGLBinding == this->glBinding()) {
         // In general ES2 requires the internal format of the texture and the format of the src
         // pixels to match. However, It may or may not be possible to upload BGRA data to a RGBA
         // texture. It depends upon which extension added BGRA. The Apple extension allows it
@@ -810,7 +810,7 @@ bool GrGpuGL::createRenderTargetObjects(int width, int height,
             !desc->fMSColorRenderbufferID ||
             !this->configToGLFormats(desc->fConfig,
                                      // GLES requires sized internal formats
-                                     kES2_GrGLBinding == this->glBinding(),
+                                     kES_GrGLBinding == this->glBinding(),
                                      &msColorFormat,
                                      NULL,
                                      NULL)) {
@@ -2303,7 +2303,7 @@ inline bool can_copy_texsubimage(const GrSurface* dst,
     // Table 3.9 of the ES2 spec indicates the supported formats with CopyTexSubImage
     // and BGRA isn't in the spec. There doesn't appear to be any extension that adds it. Perhaps
     // many drivers would allow it to work, but ANGLE does not.
-    if (kES2_GrGLBinding == gpu->glBinding() && gpu->glCaps().bgraIsInternalFormat() &&
+    if (kES_GrGLBinding == gpu->glBinding() && gpu->glCaps().bgraIsInternalFormat() &&
         (kBGRA_8888_GrPixelConfig == dst->config() || kBGRA_8888_GrPixelConfig == src->config())) {
         return false;
     }
@@ -2364,7 +2364,7 @@ inline GrGLuint bind_surface_as_fbo(const GrGLInterface* gl,
 
 void GrGpuGL::initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) {
     // Check for format issues with glCopyTexSubImage2D
-    if (kES2_GrGLBinding == this->glBinding() && this->glCaps().bgraIsInternalFormat() &&
+    if (kES_GrGLBinding == this->glBinding() && this->glCaps().bgraIsInternalFormat() &&
         kBGRA_8888_GrPixelConfig == src->config()) {
         // glCopyTexSubImage2D doesn't work with this config. We'll want to make it a render target
         // in order to call glBlitFramebuffer or to copy to it by rendering.