Revert of Mac: Fix accidental changes to fullscreen logic from refactor. (patchset...

Revert of Mac: Fix accidental changes to fullscreen logic from refactor. (patchset #2 id:40001 of https://codereview.chromium.org/575653003/)

Reason for revert:
Seems to break tests on Mac ASAN 64 Tests (3):
https://build.chromium.org/p/chromium.memory/builders/Mac%20ASan%2064%20Tests%20%283%29/builds/2665

AppShimInteractiveTest.Launch (run #1):
[ RUN      ] AppShimInteractiveTest.Launch
[3265:26883:0917/140040:ERROR:launch_services_util.cc(58)] LSOpenApplication: procNotFound (-600)
BrowserTestBase signal handler received SIGTERM. Backtrace:
0   interactive_ui_tests                0x000000010b22c753 base::debug::StackTrace::StackTrace() + 19
1   interactive_ui_tests                0x0000000115c3ce69 content::(anonymous namespace)::DumpStackTraceSignalHandler(int) + 185
2   libsystem_c.dylib                   0x00007fff8688f90a _sigtramp + 26
3   ???                                 0x000060e000009dc0 0x0 + 106515188981184
4   CoreFoundation                      0x00007fff86b16233 __CFRunLoopServiceMachPort + 195
5   CoreFoundation                      0x00007fff86b1b916 __CFRunLoopRun + 1078
6   CoreFoundation                      0x00007fff86b1b0e2 CFRunLoopRunSpecific + 290
7   HIToolbox                           0x00007fff8f4c8eb4 RunCurrentEventLoopInMode + 209
8   HIToolbox                           0x00007fff8f4c8c52 ReceiveNextEventCommon + 356
9   HIToolbox                           0x00007fff8f4c8ae3 BlockUntilNextEventMatchingListInMode + 62
10  AppKit                              0x00007fff8cc36533 _DPSNextEvent + 685
11  AppKit                              0x00007fff8cc35df2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
12  AppKit                              0x00007fff8cc2d1a3 -[NSApplication run] + 517
13  interactive_ui_tests                0x000000010b1f5186 base::MessagePumpNSApplication::DoRun(base::MessagePump::Delegate*) + 886
14  interactive_ui_tests                0x000000010b1f3b5a base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) + 474
15  interactive_ui_tests                0x000000010b2fbae2 base::RunLoop::Run() + 530
16  interactive_ui_tests                0x00000001088df0f8 apps::AppShimInteractiveTest_Launch_Test::RunTestOnMainThread() + 12296
17  interactive_ui_tests                0x0000000109e08b7a InProcessBrowserTest::RunTestOnMainThreadLoop() + 810
18  interactive_ui_tests                0x0000000115c3c633 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop() + 995
19  interactive_ui_tests                0x0000000108ea85d4 ChromeBrowserMainParts::PreMainMessageLoopRunImpl() + 12132
20  interactive_ui_tests                0x0000000108ea5288 ChromeBrowserMainParts::PreMainMessageLoopRun() + 296
21  interactive_ui_tests                0x0000000112d726a7 content::BrowserMainLoop::PreMainMessageLoopRun() + 375
22  interactive_ui_tests                0x000000011349f906 content::StartupTaskRunner::RunAllTasksNow() + 294
23  interactive_ui_tests                0x0000000112d6df2d content::BrowserMainLoop::CreateStartupTasks() + 1901
24  interactive_ui_tests                0x0000000112d79558 content::BrowserMainRunnerImpl::Initialize(content::MainFunctionParams const&) + 1000
25  interactive_ui_tests                0x0000000112d67754 content::BrowserMain(content::MainFunctionParams const&) + 404
26  interactive_ui_tests                0x0000000115c39b0c content::ContentMainRunnerImpl::Run() + 476
27  interactive_ui_tests                0x0000000115c37c2e content::ContentMain(content::ContentMainParams const&) + 142
28  interactive_ui_tests                0x0000000115c3ba37 content::BrowserTestBase::SetUp() + 1799
29  interactive_ui_tests                0x0000000109e065e9 InProcessBrowserTest::SetUp() + 745
30  interactive_ui_tests                0x000000010a510647 testing::Test::Run() + 327
31  interactive_ui_tests                0x000000010a512ac1 testing::TestInfo::Run() + 2049
32  interactive_ui_tests                0x000000010a513772 testing::TestCase::Run() + 1042
33  interactive_ui_tests                0x000000010a5285dd testing::internal::UnitTestImpl::RunAllTests() + 4173
34  interactive_ui_tests                0x000000010a527505 testing::UnitTest::Run() + 389
35  interactive_ui_tests                0x0000000115c35115 base::TestSuite::Run() + 565
36  interactive_ui_tests                0x0000000108db6494 InteractiveUITestSuiteRunner::RunTestSuite(int, char**) + 212
37  interactive_ui_tests                0x0000000115c46cc3 content::LaunchTests(content::TestLauncherDelegate*, int, int, char**) + 1763
38  interactive_ui_tests                0x0000000109e03f14 LaunchChromeTests(int, ChromeTestSuiteRunner*, int, char**) + 244
39  interactive_ui_tests                0x0000000108db6352 main + 194
40  interactive_ui_tests                0x00000001088dbb34 start + 52
41  ???                                 0x000000000000000a 0x0 + 10

Original issue's description:
> Mac: Fix accidental changes to fullscreen logic from refactor.
>
> The menu item "Enter Presentation Mode" has different effects in 10.6 and
> 10.7+. In 10.6, the menu item invokes Immersive Fullscreen. In 10.7+, the menu
> item invokes AppKit Fullscreen. Similar logic applies to fullscreen invoked by
> an extension.
>
> I accidentally changed this logic during the fullscreen refactor by removing
> the 10.6 vs 10.7+ conditional. This CL adds back the conditional. I also
> updated the code to explicitly indicate the mechanism that is invoking
> fullscreen to prevent similar future mistakes.
>
> BUG=NONE
>
> Committed: https://crrev.com/507054ccac1778eace34f76afd40ade6e855d6fc
> Cr-Commit-Position: refs/heads/master@{#295321}

TBR=rsesek@chromium.org,erikchen@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=NONE

Review URL: https://codereview.chromium.org/580973003

Cr-Commit-Position: refs/heads/master@{#295368}