Implement basic theming for panel titlebars.

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

Index: chrome/browser/ui/panels/panel_window_controller_cocoa.mm
diff --git a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
index d48f204f791c34606f217a459d1b3d728ee1b427..00d932d55e32a35eeda7975037c2a7606c213383 100644
--- a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
+++ b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
@@ -8,9 +8,14 @@
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
+#include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
+#include "chrome/browser/themes/theme_service.h"
+#include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/browser.h"
+#import "chrome/browser/ui/cocoa/browser_window_utils.h"
 #import "chrome/browser/ui/cocoa/event_utils.h"
 #import "chrome/browser/ui/cocoa/find_bar/find_bar_bridge.h"
 #import "chrome/browser/ui/cocoa/find_bar/find_bar_cocoa_controller.h"
@@ -32,6 +37,22 @@ const int kMinimumWindowSize = 1;
   return self;
 }
 
+- (ui::ThemeProvider*)themeProvider {
+  return ThemeServiceFactory::GetForProfile(windowShim_->browser()->profile());
+}
+
+- (ThemedWindowStyle)themedWindowStyle {
+  ThemedWindowStyle style = THEMED_POPUP;
+  if (windowShim_->browser()->profile()->IsOffTheRecord())
+    style |= THEMED_INCOGNITO;
+  return style;
+}
+
+- (NSPoint)themePatternPhase {
+  NSView* windowView = [[[self window] contentView] superview];
+  return [BrowserWindowUtils themePatternPhaseFor:windowView withTabStrip:nil];
+}
+
 - (void)awakeFromNib {
   NSWindow* window = [self window];
 
@@ -91,6 +112,16 @@ const int kMinimumWindowSize = 1;
   [self enableTabContentsViewAutosizing];
 }
 
+- (void)updateTitleBar {
+  NSString* newTitle = base::SysUTF16ToNSString(
+      windowShim_->browser()->GetWindowTitleForCurrentTab());
+  pendingWindowTitle_.reset(
+      [BrowserWindowUtils scheduleReplaceOldTitle:pendingWindowTitle_.get()
+                                     withNewTitle:newTitle
+                                        forWindow:[self window]]);
+  [titlebar_view_ setTitle:newTitle];
+}
+
 - (void)addFindBar:(FindBarCocoaController*)findBarCocoaController {
   NSView* contentView = [[self window] contentView];
   [contentView addSubview:[findBarCocoaController view]];