Convert the utility process image decoder into a Mojo service.

chrome/utility/chrome_content_utility_client_unittest.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "build/build_config.h"
-#include "chrome/common/chrome_utility_messages.h"
-#include "chrome/utility/chrome_content_utility_client.h"
-#include "ipc/ipc_channel.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "ui/gfx/codec/jpeg_codec.h"
-
-namespace {
-
-bool CreateJPEGImage(int width,
-                     int height,
-                     SkColor color,
-                     std::vector<unsigned char>* output) {
-  SkBitmap bitmap;
-  bitmap.allocN32Pixels(width, height);
-  bitmap.eraseColor(color);
-
-  const int kQuality = 50;
-  if (!gfx::JPEGCodec::Encode(
-          static_cast<const unsigned char*>(bitmap.getPixels()),
-          gfx::JPEGCodec::FORMAT_SkBitmap,
-          width,
-          height,
-          bitmap.rowBytes(),
-          kQuality,
-          output)) {
-    LOG(ERROR) << "Unable to encode " << width << "x" << height << " bitmap";
-    return false;
-  }
-  return true;
-}
-
-}  // namespace
-
-typedef testing::Test ChromeContentUtilityClientTest;
-
-// Test that DecodeImage() doesn't return image message > (max message size)
-TEST_F(ChromeContentUtilityClientTest, DecodeImageSizeLimit) {
-  // Using actual limit generates 14000 x 9400 images, which causes the test to
-  // timeout.  We test with a smaller limit for efficiency.
-  const size_t kTestMessageSize = IPC::Channel::kMaximumMessageSize / 1024;
-  ChromeContentUtilityClient::set_max_ipc_message_size_for_test(
-      kTestMessageSize);
-  // Approx max height for 3:2 image that will fit in IPC message;
-  // 1.5 for width/height ratio, 4 for bytes/pixel
-  int max_height_for_msg = sqrt(kTestMessageSize / (1.5 * 4));
-  int base_msg_size = sizeof(ChromeUtilityHostMsg_DecodeImage_Succeeded);
-
-  // Sizes which should trigger dimension-halving 0, 1 and 2 times
-  int heights[] = { max_height_for_msg - 10,
-                    max_height_for_msg + 10,
-                    2 * max_height_for_msg + 10 };
-  int widths[] = { heights[0] * 3 / 2, heights[1] * 3 / 2, heights[2] * 3 / 2 };
-  for (size_t i = 0; i < arraysize(heights); i++) {
-    std::vector<unsigned char> jpg;
-    CreateJPEGImage(widths[i], heights[i], SK_ColorRED, &jpg);
-    SkBitmap bitmap = ChromeContentUtilityClient::DecodeImage(jpg, true);
-
-    // Check that image has been shrunk appropriately
-    EXPECT_LT(bitmap.computeSize64() + base_msg_size,
-              static_cast<int64_t>(kTestMessageSize));
-    // Android does its own image shrinking for memory conservation deeper in
-    // the decode, so more specific tests here won't work.
-#if !defined(OS_ANDROID)
-    EXPECT_EQ(widths[i] >> i, bitmap.width());
-    EXPECT_EQ(heights[i] >> i, bitmap.height());
-
-    // Check that if resize not requested and image exceeds IPC size limit,
-    // an empty image is returned
-    if (heights[i] > max_height_for_msg) {
-      SkBitmap empty_bmp = ChromeContentUtilityClient::DecodeImage(jpg, false);
-      EXPECT_TRUE(empty_bmp.empty());
-    }
-#endif
-  }
-}