Implement Material Design for Mac toolbar.

chrome/browser/ui/cocoa/chrome_browser_window.mm

Index: chrome/browser/ui/cocoa/chrome_browser_window.mm
diff --git a/chrome/browser/ui/cocoa/chrome_browser_window.mm b/chrome/browser/ui/cocoa/chrome_browser_window.mm
index a16401952aed3928ff0c96510b5eec449ac1c579..4f12cda64c98aba999a2426561aefb03589afbcf 100644
--- a/chrome/browser/ui/cocoa/chrome_browser_window.mm
+++ b/chrome/browser/ui/cocoa/chrome_browser_window.mm
@@ -5,6 +5,7 @@
 #import "chrome/browser/ui/cocoa/chrome_browser_window.h"
 
 #include "base/logging.h"
+#include "chrome/browser/themes/theme_properties.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #include "ui/base/theme_provider.h"
 
@@ -31,4 +32,52 @@
   return [delegate themeImagePositionForAlignment:alignment];
 }
 
+- (BOOL)inIncognitoMode {
+  const ui::ThemeProvider* themeProvider = [self themeProvider];
+  return themeProvider && themeProvider->InIncognitoMode();
+}
+
+- (BOOL)inIncognitoModeWithSystemTheme {
+  const ui::ThemeProvider* themeProvider = [self themeProvider];
+  return themeProvider && themeProvider->InIncognitoMode() &&
+      themeProvider->UsingSystemTheme();
+}
+
+- (BOOL)hasDarkTheme {
+  // If a system theme, return YES if Incognito.
+  const ui::ThemeProvider* themeProvider = [self themeProvider];
+  if (!themeProvider) {
+    return NO;
+  } else if (themeProvider->UsingSystemTheme()) {
+    return themeProvider->InIncognitoMode();
+  }
+
+  // If the custom theme has a custom toolbar color, return YES if it's
+  // dark.
+  if (themeProvider->HasCustomColor(ThemeProperties::COLOR_TOOLBAR)) {
+    NSColor* theColor =
+        themeProvider->GetNSColor(ThemeProperties::COLOR_TOOLBAR);
+    theColor =
+        [theColor colorUsingColorSpaceName:NSCalibratedWhiteColorSpace];
+    if (theColor != nil) {
+      // The white componement cutoff is an empirical value.
+      return [theColor whiteComponent] < 0.7;
+    }
+  }
+
+  // If the custom theme has a custom tab text color, assume that a light
+  // color means a dark tab background image, and therefore a dark theme.
+  if (themeProvider->HasCustomColor(ThemeProperties::COLOR_TAB_TEXT)) {
+    NSColor* theColor =
+        themeProvider->GetNSColor(ThemeProperties::COLOR_TAB_TEXT);
+    theColor =
+        [theColor colorUsingColorSpaceName:NSCalibratedWhiteColorSpace];
+    if (theColor != nil) {
+      return [theColor whiteComponent] >= 0.7;
+    }
+  }
+
+  return NO;
+}
+
 @end