Added support for Text only zoom...

chrome/browser/browser.cc

Index: chrome/browser/browser.cc
===================================================================
--- chrome/browser/browser.cc	(revision 19223)
+++ chrome/browser/browser.cc	(working copy)
@@ -1035,6 +1035,18 @@
   GetSelectedTabContents()->render_view_host()->Zoom(PageZoom::SMALLER);
 }
 
+void Browser::ZoomTextOnlyIn() {
+  UserMetrics::RecordAction(L"ZoomTextOnlyPlus", profile_);
+  GetSelectedTabContents()->render_view_host()->Zoom(
+      PageZoom::TEXT_ONLY_LARGER);
+}
+
+void Browser::ZoomTextOnlyOut() {
+  UserMetrics::RecordAction(L"ZoomTextOnlyMinus", profile_);
+  GetSelectedTabContents()->render_view_host()->Zoom(
+      PageZoom::TEXT_ONLY_SMALLER);
+}
+
 void Browser::FocusToolbar() {
   UserMetrics::RecordAction(L"FocusToolbar", profile_);
   window_->FocusToolbar();
@@ -1324,9 +1336,11 @@
     case IDC_FIND_PREVIOUS:         FindPrevious();                break;
 
     // Zoom
+    case IDC_ZOOM_TEXT_ONLY_PLUS:   ZoomTextOnlyIn();              break;
     case IDC_ZOOM_PLUS:             ZoomIn();                      break;
     case IDC_ZOOM_NORMAL:           ZoomReset();                   break;
     case IDC_ZOOM_MINUS:            ZoomOut();                     break;
+    case IDC_ZOOM_TEXT_ONLY_MINUS:  ZoomTextOnlyOut();             break;
 
     // Focus various bits of UI
     case IDC_FOCUS_TOOLBAR:         FocusToolbar();                break;
@@ -1822,8 +1836,28 @@
   GetStatusBubble()->UpdateDownloadShelfVisibility(visible);
 }
 
-void Browser::ContentsZoomChange(bool zoom_in) {
-  ExecuteCommand(zoom_in ? IDC_ZOOM_PLUS : IDC_ZOOM_MINUS);
+void Browser::ContentsZoomChange(PageZoom::Function zoom_type) {
+  int zoom_requested = -1;
+
+  switch (zoom_type) {
+    case PageZoom::TEXT_ONLY_SMALLER :
+      zoom_requested = IDC_ZOOM_TEXT_ONLY_MINUS;
+      break;
+    case PageZoom::SMALLER :
+      zoom_requested = IDC_ZOOM_MINUS;
+      break;
+    case PageZoom::LARGER :
+      zoom_requested = IDC_ZOOM_PLUS;
+      break;
+    case PageZoom::TEXT_ONLY_LARGER :
+      zoom_requested = IDC_ZOOM_TEXT_ONLY_PLUS;
+      break;
+    default:
+      NOTREACHED();
+      return;
+  }
+
+  ExecuteCommand(zoom_requested);
 }
 
 void Browser::TabContentsFocused(TabContents* tab_content) {
@@ -2088,6 +2122,8 @@
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_PLUS, true);
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_NORMAL, true);
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_MINUS, true);
+  command_updater_.UpdateCommandEnabled(IDC_ZOOM_TEXT_ONLY_PLUS, true);
+  command_updater_.UpdateCommandEnabled(IDC_ZOOM_TEXT_ONLY_MINUS, true);
 
   // Show various bits of UI
   command_updater_.UpdateCommandEnabled(IDC_OPEN_FILE, true);