Upstream oodles of Chrome for Android code into Chromium.

chrome/browser/android/tab/thumbnail_tab_helper_android.cc

Index: chrome/browser/android/tab/thumbnail_tab_helper_android.cc
diff --git a/chrome/browser/android/tab/thumbnail_tab_helper_android.cc b/chrome/browser/android/tab/thumbnail_tab_helper_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3c6328fda4b048855d0e7ec570dfc86723344731
--- /dev/null
+++ b/chrome/browser/android/tab/thumbnail_tab_helper_android.cc
@@ -0,0 +1,98 @@
+// Copyright 2015 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 "chrome/browser/android/tab/thumbnail_tab_helper_android.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/memory/ref_counted.h"
+#include "chrome/browser/history/top_sites_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_android.h"
+#include "chrome/browser/thumbnails/thumbnail_service.h"
+#include "chrome/browser/thumbnails/thumbnail_service_factory.h"
+#include "chrome/browser/thumbnails/thumbnail_tab_helper.h"
+#include "components/history/core/browser/top_sites.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/ThumbnailTabHelper_jni.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/android/java_bitmap.h"
+#include "ui/gfx/color_utils.h"
+#include "ui/gfx/image/image_skia.h"
+#include "url/gurl.h"
+
+// static
+bool RegisterThumbnailTabHelperAndroid(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+static void InitThumbnailHelper(JNIEnv* env,
+                                jclass clazz,
+                                jobject jweb_contents) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(jweb_contents);
+  DCHECK(web_contents);
+
+  // Don't allow ThumbnailTabHelper to take thumbnail snapshots.
+  // Currently the process is driven from Tab, but long term will
+  // move into a Android specific tab helper.
+  // Bug: crbug.com/157431
+  ThumbnailTabHelper* thumbnail_tab_helper =
+      ThumbnailTabHelper::FromWebContents(web_contents);
+  if (thumbnail_tab_helper)
+    thumbnail_tab_helper->set_enabled(false);
+}
+
+static jboolean ShouldUpdateThumbnail(
+    JNIEnv* env, jclass clazz, jobject jprofile, jstring jurl) {
+  Profile* profile = ProfileAndroid::FromProfileAndroid(jprofile);
+
+  GURL url(base::android::ConvertJavaStringToUTF8(env, jurl));
+  scoped_refptr<thumbnails::ThumbnailService> thumbnail_service =
+      ThumbnailServiceFactory::GetForProfile(profile);
+  return (thumbnail_service.get() != NULL &&
+          thumbnail_service->ShouldAcquirePageThumbnail(url));
+}
+
+static void UpdateThumbnail(JNIEnv* env,
+                            jclass clazz,
+                            jobject jweb_contents,
+                            jobject bitmap,
+                            jboolean jat_top) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(jweb_contents);
+  DCHECK(web_contents);
+
+  Profile* profile = Profile::FromBrowserContext(
+      web_contents->GetBrowserContext());
+
+  gfx::JavaBitmap bitmap_lock(bitmap);
+  SkBitmap sk_bitmap;
+  gfx::Size size = bitmap_lock.size();
+  SkColorType color_type = kN32_SkColorType;
+  sk_bitmap.setInfo(
+      SkImageInfo::Make(size.width(), size.height(),
+                        color_type, kPremul_SkAlphaType), 0);
+  sk_bitmap.setPixels(bitmap_lock.pixels());
+
+  // TODO(nileshagrawal): Refactor this.
+  // We were using some non-public methods from ThumbnailTabHelper. We need to
+  // either add android specific logic to ThumbnailTabHelper or create our own
+  // helper which is driven by the java app (will need to pull out some logic
+  // from ThumbnailTabHelper to a common class).
+  scoped_refptr<history::TopSites> ts = TopSitesFactory::GetForProfile(profile);
+  if (!ts)
+    return;
+
+  // Compute the thumbnail score.
+  ThumbnailScore score;
+  score.at_top = jat_top;
+  score.boring_score = color_utils::CalculateBoringScore(sk_bitmap);
+  score.good_clipping = true;
+  score.load_completed = !web_contents->IsLoading();
+
+  gfx::Image image = gfx::Image::CreateFrom1xBitmap(sk_bitmap);
+  const GURL& url = web_contents->GetURL();
+  ts->SetPageThumbnail(url, image, score);
+}