Add glGetActiveUniformBlockiv to GPU command buffer.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 9b8e63521ebd82282316474833e1feed8031452a..886d6e4c2d171637ba4b546b135c5de3e43bd1a9 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -9730,6 +9730,63 @@ error::Error GLES2DecoderImpl::HandleGetActiveUniform(
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandleGetActiveUniformBlockiv(
+    uint32 immediate_data_size, const void* cmd_data) {
+  if (!unsafe_es3_apis_enabled())
+    return error::kUnknownCommand;
+  const gles2::cmds::GetActiveUniformBlockiv& c =
+      *static_cast<const gles2::cmds::GetActiveUniformBlockiv*>(cmd_data);
+  GLuint program_id = c.program;
+  GLuint index = static_cast<GLuint>(c.index);
+  GLenum pname = static_cast<GLenum>(c.pname);
+  Program* program = GetProgramInfoNotShader(
+      program_id, "glGetActiveUniform");
+  if (!program) {
+    return error::kNoError;
+  }
+  GLuint service_id = program->service_id();
+  GLint link_status = GL_FALSE;
+  glGetProgramiv(service_id, GL_LINK_STATUS, &link_status);
+  if (link_status != GL_TRUE) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION,
+        "glGetActiveActiveUniformBlockiv", "program not linked");
+    return error::kNoError;
+  }
+  LOCAL_COPY_REAL_GL_ERRORS_TO_WRAPPER("GetActiveUniformBlockiv");
+  GLsizei num_values = 1;
+  if (pname == GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES) {
+    GLint num = 0;
+    glGetActiveUniformBlockiv(
+        service_id, index, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &num);
+    GLenum error = glGetError();
+    if (error != GL_NO_ERROR) {
+      // Assume this will the same error if calling with pname.
+      LOCAL_SET_GL_ERROR(error, "GetActiveUniformBlockiv", "");
+      return error::kNoError;
+    }
+    num_values = static_cast<GLsizei>(num);
+  }
+  typedef cmds::GetActiveUniformBlockiv::Result Result;
+  Result* result = GetSharedMemoryAs<Result*>(
+      c.params_shm_id, c.params_shm_offset, Result::ComputeSize(num_values));
+  GLint* params = result ? result->GetData() : NULL;
+  if (params == NULL) {
+    return error::kOutOfBounds;
+  }
+  // Check that the client initialized the result.
+  if (result->size != 0) {
+    return error::kInvalidArguments;
+  }
+  glGetActiveUniformBlockiv(service_id, index, pname, params);
+  GLenum error = glGetError();
+  if (error == GL_NO_ERROR) {
+    result->SetNumResults(num_values);
+  } else {
+    LOCAL_SET_GL_ERROR(error, "GetActiveUniformBlockiv", "");
+  }
+  return error::kNoError;
+}
+
 error::Error GLES2DecoderImpl::HandleGetActiveUniformBlockName(
     uint32 immediate_data_size, const void* cmd_data) {
   if (!unsafe_es3_apis_enabled())