Revert of Fix blits from multisampled renderbuffers to alpha:false WebGL back buffer.

gpu/GLES2/gl2extchromium.h

Index: gpu/GLES2/gl2extchromium.h
diff --git a/gpu/GLES2/gl2extchromium.h b/gpu/GLES2/gl2extchromium.h
index 8c1f3df16cf2c70767066eb5e993236b90ad7a39..e38949b5757ec32233014a29090d457676255dfc 100644
--- a/gpu/GLES2/gl2extchromium.h
+++ b/gpu/GLES2/gl2extchromium.h
@@ -84,14 +84,6 @@
                                                     GLsizei height,
                                                     GLenum internalformat);
 GL_APICALL void GL_APIENTRY glDestroyImageCHROMIUM(GLuint image_id);
-GL_APICALL void GL_APIENTRY glBindTexImage2DCHROMIUM(GLenum target,
-                                                     GLint imageId);
-GL_APICALL void GL_APIENTRY
-glBindTexImage2DWithInternalformatCHROMIUM(GLenum target,
-                                           GLenum internalformat,
-                                           GLint imageId);
-GL_APICALL void GL_APIENTRY glReleaseTexImage2DCHROMIUM(GLenum target,
-                                                        GLint imageId);
 #endif
 typedef GLuint(GL_APIENTRYP PFNGLCREATEIMAGECHROMIUMPROC)(
     ClientBuffer buffer,
@@ -100,14 +92,6 @@
     GLenum internalformat);
 typedef void (
     GL_APIENTRYP PFNGLDESTROYIMAGECHROMIUMPROC)(GLuint image_id);
-typedef void(GL_APIENTRYP PFNGLBINDTEXIMAGE2DCHROMIUMPROC)(GLenum target,
-                                                           GLint imageId);
-typedef void(GL_APIENTRYP PFNGLBINDTEXIMAGE2DWITHINTERNALFORMATCHROMIUMPROC)(
-    GLenum target,
-    GLenum internalformat,
-    GLint imageId);
-typedef void(GL_APIENTRYP PFNGLRELEASETEXIMAGE2DCHROMIUMPROC)(GLenum target,
-                                                              GLint imageId);
 #endif  /* GL_CHROMIUM_image */
 
 #ifndef GL_RGB_YCRCB_420_CHROMIUM
@@ -184,6 +168,21 @@
 #define GL_GET_ERROR_QUERY_CHROMIUM 0x6003
 #endif
 #endif  /* GL_CHROMIUM_get_error_query */
+
+/* GL_CHROMIUM_texture_from_image */
+#ifndef GL_CHROMIUM_texture_from_image
+#define GL_CHROMIUM_texture_from_image 1
+#ifdef GL_GLEXT_PROTOTYPES
+GL_APICALL void GL_APIENTRY glBindTexImage2DCHROMIUM(
+    GLenum target, GLint imageId);
+GL_APICALL void GL_APIENTRY glReleaseTexImage2DCHROMIUM(
+    GLenum target, GLint imageId);
+#endif
+typedef void (GL_APIENTRYP PFNGLBINDTEXIMAGE2DCHROMIUMPROC) (
+    GLenum target, GLint imageId);
+typedef void (GL_APIENTRYP PFNGLRELEASETEXIMAGE2DCHROMIUMPROC) (
+    GLenum target, GLint imageId);
+#endif  /* GL_CHROMIUM_texture_from_image */
 
 /* GL_CHROMIUM_post_sub_buffer */
 #ifndef GL_CHROMIUM_post_sub_buffer