History access in Webview update.

Webview now has:
-getPagesHistory function, returning array of URLs, titles and favicons of pages in history. Titles and favicons are not known for current page because array is created before page is fully loaded.
-getCurrentHistoryIndex function, returning current history index

Author: janRucka

extensions/browser/guest_view/web_view/web_view_guest.cc

@@ -26,6 +26,7 @@
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_security_policy.h"
+#include "content/public/browser/favicon_status.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
@@ -859,6 +860,16 @@ void WebViewGuest::DidFinishNavigation(
                    web_contents()->GetController().GetCurrentEntryIndex());
   args->SetInteger(webview::kInternalEntryCount,
                    web_contents()->GetController().GetEntryCount());
+
+  base::ListValue *history = new base::ListValue();
+  for (int i = 0; i < web_contents()->GetController().GetEntryCount(); i++) {
+    base::DictionaryValue* dict = new base::DictionaryValue;
+    dict->SetString("url", web_contents()->GetController().GetEntryAtIndex(i)->GetURL().spec());
+    dict->SetString("title", web_contents()->GetController().GetEntryAtIndex(i)->GetTitle());
+    dict->SetString("favicon", web_contents()->GetController().GetEntryAtIndex(i)->GetFavicon().url.spec());
+    history->Append(dict);
+  }
+  args->Set("pagesHistory", history);
   args->SetInteger(webview::kInternalProcessId,
                    web_contents()->GetRenderProcessHost()->GetID());
   DispatchEventToView(base::MakeUnique<GuestViewEvent>(

extensions/renderer/resources/guest_view/web_view/web_view.js

@@ -148,11 +148,12 @@ WebViewImpl.prototype.onFrameNameChanged = function(name) {
 // Updates state upon loadcommit.
 WebViewImpl.prototype.onLoadCommit = function(
     baseUrlForDataUrl, currentEntryIndex, entryCount,
-    processId, url, isTopLevel) {
+    processId, url, isTopLevel, pagesHistory) {
   this.baseUrlForDataUrl = baseUrlForDataUrl;
   this.currentEntryIndex = currentEntryIndex;
   this.entryCount = entryCount;
   this.processId = processId;
+  this.pagesHistory = pagesHistory;
   if (isTopLevel) {
     // Touching the src attribute triggers a navigation. To avoid
     // triggering a page reload on every guest-initiated navigation,

extensions/renderer/resources/guest_view/web_view/web_view_api_methods.js

@@ -52,6 +52,12 @@ var WEB_VIEW_API_METHODS = [
   // Navigates to the subsequent history entry.
   'forward',
 
+  // Get current history index
+  'getCurrentHistoryIndex',
+
+  // Get array with history of URLs titles and favicons
+  'getPagesHistory',
+
   // Returns Chrome's internal process ID for the guest web page's current
   // process.
   'getProcessId',
@@ -82,6 +88,7 @@ var WEB_VIEW_API_METHODS = [
   'loadDataWithBaseUrl',
 
   'showDevTools',
+
   // Prints the contents of the webview.
   'print',
 
@@ -151,6 +158,14 @@ WebViewImpl.prototype.getUserAgent = function() {
   return this.userAgentOverride || navigator.userAgent;
 };
 
+WebViewImpl.prototype.getCurrentHistoryIndex = function () {
+    return this.currentEntryIndex;
+};
+
+WebViewImpl.prototype.getPagesHistory = function() {
+    return this.pagesHistory;
+};
+
 WebViewImpl.prototype.insertCSS = function(var_args) {
   return this.executeCode(WebViewInternal.insertCSS, $Array.slice(arguments));
 };

extensions/renderer/resources/guest_view/web_view/web_view_events.js

@@ -249,7 +249,8 @@ WebViewEvents.prototype.handleLoadCommitEvent = function(event, eventName) {
                          event.entryCount,
                          event.processId,
                          event.url,
-                         event.isTopLevel);
+                         event.isTopLevel,
+                         event.pagesHistory);
   var webViewEvent = this.makeDomEvent(event, eventName);
   this.view.dispatchEvent(webViewEvent);
 };