Removed emojis from generated_resources.grd and update the code.

chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm b/chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm
index cfe3a71bb9e0a5e9f3eabb76901cd39a4506f421..a691ac4674ef637c7052da55d2996299fa7aa608 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm
@@ -9,6 +9,7 @@
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #include "chrome/browser/media/media_stream_capture_indicator.h"
 #include "chrome/browser/ui/browser_window.h"
+#import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #import "chrome/browser/ui/cocoa/new_tab_button.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_controller.h"
@@ -29,6 +30,25 @@
 using content::SiteInstance;
 using content::WebContents;
 
+@interface TabStripControllerForMediaTesting : TabStripController {
+  // Keeps media state of tabs in browser for testing purpose.
+  std::map<content::WebContents*, TabMediaState> contents_media_state_maps;
+}
+@end
+
+@implementation TabStripControllerForMediaTesting
+// Returns the media state of each tab from the map we are keeping.
+- (TabMediaState)mediaStateForContents:(content::WebContents*)contents {
+  return contents_media_state_maps[contents];
+}
+
+- (void)setMediaStateForContents:(content::WebContents*)contents
+                  withMediaState:(TabMediaState)media_state {
+  contents_media_state_maps[contents] = media_state;
+}
+
+@end
+
 @interface TestTabStripControllerDelegate
     : NSObject<TabStripControllerDelegate> {
 }
@@ -102,7 +122,8 @@ class TabStripControllerTest : public CocoaProfileTest {
     NSRect switch_frame = NSMakeRect(0, 0, content_frame.size.width, 500);
     base::scoped_nsobject<NSView> switch_view(
         [[NSView alloc] initWithFrame:switch_frame]);
-    [parent addSubview:switch_view.get()];
+    switch_view_ = switch_view;
+    [parent addSubview:switch_view_.get()];
 
     // Create the tab strip view. It's expected to have a child button in it
     // already as the "new tab" button so create that too.
@@ -135,6 +156,17 @@ class TabStripControllerTest : public CocoaProfileTest {
     CocoaProfileTest::TearDown();
   }
 
+  // Return a derived TabStripController.
+  TabStripControllerForMediaTesting* InitTabStripControllerForMediaTesting() {
+    TabStripControllerForMediaTesting* c =
+        [[TabStripControllerForMediaTesting alloc]
+            initWithView:static_cast<TabStripView*>(tab_strip_.get())
+              switchView:switch_view_.get()
+                 browser:browser()
+                delegate:controller_delegate_.get()];
+    return c;
+  }
+
   TabView* CreateTab() {
     SiteInstance* instance = SiteInstance::Create(profile());
     WebContents* web_contents = WebContents::Create(
@@ -162,6 +194,7 @@ class TabStripControllerTest : public CocoaProfileTest {
   base::scoped_nsobject<TestTabStripControllerDelegate> controller_delegate_;
   base::scoped_nsobject<TabStripController> controller_;
   base::scoped_nsobject<TabStripView> tab_strip_;
+  base::scoped_nsobject<NSView> switch_view_;
 };
 
 // Test adding and removing tabs and making sure that views get added to
@@ -349,4 +382,87 @@ TEST_F(TabStripControllerTest, ViewAccessibility_Value) {
   EXPECT_EQ(tab1, value);
 }
 
+TEST_F(TabStripControllerTest, CorrectWindowFromUpdateWindowMediaState) {
+  controller_.reset(InitTabStripControllerForMediaTesting());
+  NSWindow* window = [tab_strip_ window];
+  BrowserWindowController* window_controller =
+      [BrowserWindowController browserWindowControllerForWindow:window];
+  TabStripControllerForMediaTesting* tabStripControllerForTesting =
+      static_cast<TabStripControllerForMediaTesting*>(controller_);
+
+  TabView* const tab1 = CreateTab();
+  TabView* const tab2 = CreateTab();
+
+  // tab2 should be the selected one.
+  EXPECT_FALSE([tab1 controller].selected);
+  EXPECT_TRUE([tab2 controller].selected);
+  WebContents* const contents_at_tab1 = model_->GetActiveWebContents();
+
+  [tabStripControllerForTesting
+      setMediaStateForContents:contents_at_tab1
+                withMediaState:TAB_MEDIA_STATE_AUDIO_PLAYING];
+  // Make sure the overriden from base controller correctly handles media
+  // status of tabs.
+  EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_PLAYING,
+            [controller_ mediaStateForContents:contents_at_tab1]);
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_AUDIO_PLAYING
+                                   on:contents_at_tab1];
+  // Because we have one tab playing, and the other one's media state is none,
+  // window media state should be AUDIO_PLAYING.
+  EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_PLAYING, [window_controller mediaState]);
+
+  model_->ActivateTabAt(0, false);
+  // tab1 should be the selected one now.
+  EXPECT_TRUE([tab1 controller].selected);
+  EXPECT_FALSE([tab2 controller].selected);
+  WebContents* const contents_at_tab0 = model_->GetActiveWebContents();
+
+  [tabStripControllerForTesting
+      setMediaStateForContents:contents_at_tab0
+                withMediaState:TAB_MEDIA_STATE_AUDIO_MUTING];
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_AUDIO_MUTING
+                                   on:contents_at_tab0];
+  // We have two tabs. One is playing and the other one is muting. The window
+  // media state should be still AUDIO_PLAYING.
+  EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_PLAYING, [window_controller mediaState]);
+
+  [tabStripControllerForTesting
+      setMediaStateForContents:contents_at_tab1
+                withMediaState:TAB_MEDIA_STATE_AUDIO_MUTING];
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_AUDIO_MUTING
+                                   on:contents_at_tab1];
+  // Now both tabs are muting, the window media state should be AUDIO_MUTING.
+  EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_MUTING, [window_controller mediaState]);
+
+  [tabStripControllerForTesting
+      setMediaStateForContents:contents_at_tab0
+                withMediaState:TAB_MEDIA_STATE_AUDIO_PLAYING];
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_AUDIO_PLAYING
+                                   on:contents_at_tab0];
+  // Among those tabs which were muting, one is started playing, the window
+  // media state should be playing.
+  EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_PLAYING, [window_controller mediaState]);
+
+  // Mute it again for further testing.
+  [tabStripControllerForTesting
+      setMediaStateForContents:contents_at_tab0
+                withMediaState:TAB_MEDIA_STATE_AUDIO_MUTING];
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_AUDIO_MUTING
+                                   on:contents_at_tab0];
+
+  [tabStripControllerForTesting setMediaStateForContents:contents_at_tab1
+                                          withMediaState:TAB_MEDIA_STATE_NONE];
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_NONE on:contents_at_tab1];
+  // One of the tabs is muting, the other one is none. So window media state
+  // should be MUTING.
+  EXPECT_EQ(TAB_MEDIA_STATE_AUDIO_MUTING, [window_controller mediaState]);
+
+  [tabStripControllerForTesting setMediaStateForContents:contents_at_tab0
+                                          withMediaState:TAB_MEDIA_STATE_NONE];
+  [controller_ updateWindowMediaState:TAB_MEDIA_STATE_NONE on:contents_at_tab0];
+  // Neither of tabs playing nor muting, so the window media state should be
+  // NONE.
+  EXPECT_EQ(TAB_MEDIA_STATE_NONE, [window_controller mediaState]);
+}
+
 }  // namespace