Update CopyTexImage2D to do internal format validation in ES3

gpu/command_buffer/common/gles2_cmd_utils.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include <sstream>
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 1192 matching lines @@
       return false;
   }
 }
 
 // static
 bool GLES2Util::IsIntegerFormat(uint32_t internal_format) {
   return (IsUnsignedIntegerFormat(internal_format) ||
           IsSignedIntegerFormat(internal_format));
 }
 
+// static
+bool GLES2Util::IsFloatFormat(uint32_t internal_format) {
+  switch (internal_format) {
+    case GL_R16F:
+    case GL_R32F:
+    case GL_RG16F:
+    case GL_RG32F:
+    case GL_R11F_G11F_B10F:
+    case GL_RGB16F:
+    case GL_RGB32F:
+    case GL_RGBA16F:
+    case GL_RGBA32F:
+      return true;
+    default:
+      return false;
+  }
+}
 
 namespace {
 
 // WebGraphicsContext3DCommandBufferImpl configuration attributes. Those in
 // the 16-bit range are the same as used by EGL. Those outside the 16-bit range
 // are unique to Chromium. Attributes are matched using a closest fit algorithm.
 
 // From <EGL/egl.h>.
 const int32 kAlphaSize       = 0x3021;  // EGL_ALPHA_SIZE
 const int32 kBlueSize        = 0x3022;  // EGL_BLUE_SIZE
@@ skipping 141 matching lines @@
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu