Change CHROMIUM_image declarations to support multi planar input.

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt

Index: gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt
diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt
index 2974e43bd32b7d01d4384cb62c7011a90d07a660..89604e1125b3d42413a7e780e15c087041499ca0 100644
--- a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt
@@ -29,21 +29,25 @@ New Tokens
 
 New Procedures and Functions
 
-    GLuint CreateImageCHROMIUM(ClientBuffer buffer,
+    GLuint CreateImageCHROMIUM(ClientBuffer* buffers,
                                GLsizei width,
                                GLsizei height,
                                GLenum internalformat)
 
-    Create an image from <buffer> with width equal to <width> and
+    Create an image from <buffers> with width equal to <width> and
     height equal to <height> and format equal to <internalformat>.
 
+    <buffers> specifies an array in which ClientBuffer elements corresponding
+    to image planes are stored. The number of ClientBuffer objects are inferred
+    through the specified <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_VALUE is generated if <buffers> is an empty pointer, or <width> or
+    <height> is nonpositive.
 
-    INVALID_ENUM is generated if <internalformat> is not one of
-    RGB or RGBA.
+    INVALID_ENUM is generated if <internalformat> is not one of RGB or RGBA.
 
     void DestroyImageCHROMIUM(GLuint image_id)