Update GL_CHROMIUM_image with support for compressed formats.

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt

 Name
 
     CHROMIUM_image
 
 Name Strings
 
     GL_CHROMIUM_image
 
 Version
 
-    Last Modifed Date: Oct 7, 2014
+    Last Modifed Date: May 13, 2015
 
 Dependencies
 
     OpenGL ES 2.0 is required.
 
     EXT_texture_format_BGRA8888 affects the definition of this extension.
     ARB_texture_rg affects the definition of this extension.
 
 Overview
 
@@ skipping 16 matching lines @@
                                GLenum internalformat)
 
     Create an image from <buffer> with width equal to <width> and
     height equal to <height> and format equal to <internalformat>.
 
     Returns a unique identifier for the image that could be used in
     subsequent operations.
 
     INVALID_VALUE is generated if <width> or <height> is nonpositive.
 
-    INVALID_ENUM is generated if <internalformat> is not one of
-    R8, RGB, RGBA or BGRA_EXT.
+    INVALID_VALUE is generated if <internalformat> is not one of
+    R8, RGB, RGBA, BGRA_EXT, ATC_RGB_AMD, ATC_RGBA_INTERPOLATED_ALPHA_AMD,
+    COMPRESSED_RGB_S3TC_DXT1_EXT, COMPRESSED_RGBA_S3TC_DXT5_EXT or
+    ETC1_RGB8_OES.
 
     void DestroyImageCHROMIUM(GLuint image_id)
 
     Frees the image previously created by a call to CreateImageCHROMIUM.
 
     INVALID_OPERATION is generated if <image_id> is not a valid image id.
 
 Dependencies on EXT_texture_format_BGRA8888
 
     If EXT_texture_format_BGRA8888 is not supported:
      * delete any reference to the BGRA_EXT format.
 
 Dependencies on ARB_texture_rg
 
     If ARB_texture_rg is not supported:
      * delete any reference to the R8 format.
 
+Dependencies on AMD_compressed_ATC_texture
+
+    If AMD_compressed_ATC_texture is not supported:
+     * delete any reference to the ATC_RGB_AMD and
+       ATC_RGBA_INTERPOLATED_ALPHA_AMD formats.
+
+Dependencies on EXT_texture_compression_s3tc
+
+    If EXT_texture_compression_s3tc is not supported:
+     * delete any reference to the COMPRESSED_RGB_S3TC_DXT1_EXT and
+       COMPRESSED_RGBA_S3TC_DXT5_EXT formats.
+
+Dependencies on OES_compressed_ETC1_RGB8_texture
+
+    If OES_compressed_ETC1_RGB8_texture is not supported:
+     * delete any reference to the ETC1_RGB8_OES format.
+
 Errors
 
     None.
 
 New State
 
     None.
 
 Revision History
 
     5/9/2013    Documented the extension
     4/30/2014   Moved usage flag to creation function.
     10/7/2014   Remove map/unmap API.
     4/6/2015    Add BGRA_EXT format.
     2/7/2015    Add R8 format.
+    5/13/2015   Add compressed formats.