Android WebView visited link highlighting implementation part 1

android_webview/browser/aw_browser_context.cc

Index: android_webview/browser/aw_browser_context.cc
diff --git a/android_webview/browser/aw_browser_context.cc b/android_webview/browser/aw_browser_context.cc
index 8a9230c49ee1ee3c69e739d497075ba28d986d41..5d13152076f2ccd5197441c607ff88b491eadb0c 100644
--- a/android_webview/browser/aw_browser_context.cc
+++ b/android_webview/browser/aw_browser_context.cc
@@ -5,6 +5,9 @@
 #include "android_webview/browser/aw_browser_context.h"
 
 #include "android_webview/browser/net/aw_url_request_context_getter.h"
+#include "components/visitedlink/browser/visitedlink_master.h"
+
+using content::BrowserContext;
 
 namespace android_webview {
 
@@ -18,11 +21,23 @@ AwBrowserContext::AwBrowserContext(
 AwBrowserContext::~AwBrowserContext() {
 }
 
+// static
+AwBrowserContext* AwBrowserContext::FromBrowserContext(
+    BrowserContext* browser_context) {
+  // This is safe; this is the only implementation of the browser context.
+  return static_cast<AwBrowserContext*>(browser_context);
+}
+
 void AwBrowserContext::InitializeBeforeThreadCreation() {
   DCHECK(!url_request_context_getter_);
   url_request_context_getter_ = new AwURLRequestContextGetter(this);
 }
 
+void AwBrowserContext::PreMainMessageLoopRun() {
+  visitedlink_master_.reset(new components::VisitedLinkMaster(this, this));
+  visitedlink_master_->Init();
+}
+
 FilePath AwBrowserContext::GetPath() {
   return context_storage_path_;
 }
@@ -96,4 +111,36 @@ quota::SpecialStoragePolicy* AwBrowserContext::GetSpecialStoragePolicy() {
   return NULL;
 }
 
+void AwBrowserContext::AddVisitedURL(const GURL& url) {
+  DCHECK(visitedlink_master_);
+  visitedlink_master_->AddURL(url);
+}
+
+void AwBrowserContext::AddVisitedURLs(const std::vector<GURL>& urls) {
+  DCHECK(visitedlink_master_);
+  visitedlink_master_->AddURLs(urls);
+}
+
+bool AwBrowserContext::PersistToDisk() const {
+  // Persistence of VisitedLink database is handled by the embedding app and
+  // passed to us through WebChromeClient.getVisitedHistory.
+  return false;
+}
+
+bool AwBrowserContext::AreEquivalentContexts(
+    BrowserContext* context1,
+    BrowserContext* context2) {
+  // Raw pointer comparison since Android WebView does not have sub-contexts
+  // like incognito.
+  return context1 == context2;
+}
+
+void AwBrowserContext::RebuildTable(
+    const scoped_refptr<URLEnumerator>& enumerator) {
+  // Android WebView rebuilds from WebChromeClient.getVisitedHistory. The client
+  // can change in the lifetime of this WebView and may not yet be set here.
+  // Therefore this initialization path is not used.
+  enumerator->OnComplete(true);
+}
+
 }  // namespace android_webview