Fix int overflow in GLES2DecoderImpl::DoDrawArrays

gpu/command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc
index 3039b0826b33b9a0e4eb44d58534efa75fa58847..b78da1e7e5caf72d39a3e5fd3bae01c74b77c115 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_drawing.cc
@@ -803,6 +803,18 @@ TEST_P(GLES2DecoderWithShaderTest,
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
 
+TEST_P(GLES2DecoderWithShaderTest, DrawArraysIntOverflow) {
+  DoEnableVertexAttribArray(1);
+
+  GLint large = std::numeric_limits<GLint>::max();
+
+  EXPECT_CALL(*gl_, DrawArrays(_, _, _)).Times(0);
+  DrawArrays cmd;
+  cmd.Init(GL_TRIANGLES, large, large);
+  EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+  EXPECT_EQ(GL_INVALID_OPERATION, GetGLError());
+}
+
 TEST_P(GLES2DecoderWithShaderTest, DrawArraysValidAttributesSucceeds) {
   SetupTexture();
   SetupVertexBuffer();