Add GLStreamTextureImage

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_stream_texture_matrix.txt

Index: gpu/GLES2/extensions/CHROMIUM/CHROMIUM_stream_texture_matrix.txt
diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_stream_texture_matrix.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_stream_texture_matrix.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4a6cf25c044ca21e6db0218ae4e26d00b9effbf1
--- /dev/null
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_stream_texture_matrix.txt
@@ -0,0 +1,58 @@
+Name
+
+    CHROMIUM_stream_texture_matrix
+
+Name Strings
+
+    CHROMIUM_stream_texture_matrix
+
+Version
+
+    Last Modifed Date: February 16, 2016
+
+Dependencies
+
+    OpenGL ES 2.0 is required.
+
+Overview
+
+    Allows clients to set the value of a 4x4 unform to the current texture

[reveman, 2016/02/19 19:15:39]

nit: s/unform/uniform/

[liberato (no reviews please), 2016/02/19 19:48:11]

Done.

+    matrix of a stream texture.
+
+    Allows shader access to the texture matrix for the current front buffer
+    of a stream texture.  Intended for use with Android SurfaceTexture, which
+    doesn't provide the value until the front buffer is latched.
+
+New Procedures and Functions
+
+    The command
+
+       void UniformMatrix4fvStreamTextureMatrixCHROMIUM(
+               GLintUniformLocation location,
+               GLbooleanFalseOnly transpose,
+               const GLfloat* default_value)
+
+    Updates a uniform to match the current stream texture's texture matrix.
+    The stream texture must be bound to the GL_TEXTURE_EXTERNAL_OES target on
+    the active texture unit.
+
+    If the bound texture is not a stream texture, then the default value is
+    used instead.
+
+    <location> Specifies the 4x4f uniform location to be modified.
+    <transpose> Specifies whether the matrix should be transposed.
+    <default_value> Provides the default matrix.
+
+    The default value is a transitionary step.  It will be removed.
+
+Errors
+
+    None.
+
+New State
+
+    None.
+
+Revision History
+
+    02/16/2016    Documented the extension