Pass LoadUrlParams instead of just url to TabObserver.onLoadUrl

Some observers will need more information than just the url.

BUG=443773

Review URL: https://codereview.chromium.org/930933006

Cr-Commit-Position: refs/heads/master@{#317588}

chrome/android/java/src/org/chromium/chrome/browser/EmptyTabObserver.java

@@ -7,6 +7,7 @@ package org.chromium.chrome.browser;
 import android.view.ContextMenu;
 
 import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.WebContents;
 
 /**
@@ -38,6 +39,9 @@ public class EmptyTabObserver implements TabObserver {
     @Override
     public void onLoadUrl(Tab tab, String url, int loadType) { }
 
+    @Override
+    public void onLoadUrl(Tab tab, LoadUrlParams params, int loadType) { }
+
     @Override
     public void onPageLoadStarted(Tab tab) { }
 

chrome/android/java/src/org/chromium/chrome/browser/Tab.java

@@ -781,7 +781,7 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
                     params.getIsRendererInitiated(), params.getIntentReceivedTimestamp());
 
             for (TabObserver observer : mObservers) {
-                observer.onLoadUrl(this, params.getUrl(), loadType);
+                observer.onLoadUrl(this, params, loadType);
             }
             return loadType;
         } finally {

chrome/android/java/src/org/chromium/chrome/browser/TabObserver.java

@@ -7,6 +7,7 @@ package org.chromium.chrome.browser;
 import android.view.ContextMenu;
 
 import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.WebContents;
 
 /**
@@ -60,10 +61,17 @@ public interface TabObserver {
      */
     void onOverlayContentViewCoreRemoved(Tab tab, ContentViewCore content);
 
+    /**
+     * Use onLoadUrl(Tab, LoadUrlParams, int)
+     * TODO(yfriedman): Remove this
+     */
+    @Deprecated
+    void onLoadUrl(Tab tab, String url, int loadType);
+
     /**
      * Called when loadUrl is triggered on a a {@link Tab}.
      * @param tab      The notifying {@link Tab}.
-     * @param url      The url that is being loaded.
+     * @param params   The params describe the page being loaded.
      * @param loadType The type of load that was performed.
      *
      * @see TabLoadStatus#PAGE_LOAD_FAILED
@@ -71,7 +79,8 @@ public interface TabObserver {
      * @see TabLoadStatus#PARTIAL_PRERENDERED_PAGE_LOAD
      * @see TabLoadStatus#FULL_PRERENDERED_PAGE_LOAD
      */
-    void onLoadUrl(Tab tab, String url, int loadType);
+    void onLoadUrl(Tab tab, LoadUrlParams params, int loadType);
+
 
     /**
      * Called when a tab has started to load a page.