Remove unneeded platform_thread.h includes. Reduces number of includes from 598 to 511.

Review URL: http://codereview.chromium.org/42165

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11617 0039d316-1c4b-4281-b951-d872f2087c98

base/thread_collision_warner.cc

@@ -4,8 +4,8 @@
 
 #include "base/thread_collision_warner.h"
 
-#include "base/atomicops.h"
 #include "base/logging.h"
+#include "base/platform_thread.h"
 
 namespace base {
 

base/thread_collision_warner.h

@@ -8,7 +8,6 @@
 #include <memory>
 
 #include "base/atomicops.h"
-#include "base/platform_thread.h"
 
 // A helper class alongside macros to be used to verify assumptions about thread
 // safety of a class.

chrome/browser/net/dns_master_unittest.cc

@@ -9,7 +9,6 @@
 #include <string>
 
 #include "base/message_loop.h"
-#include "base/platform_thread.h"
 #include "base/scoped_ptr.h"
 #include "base/timer.h"
 #include "chrome/browser/net/dns_global.h"

media/base/pipeline_impl_unittest.cc

@@ -4,7 +4,6 @@
 
 #include <string>
 
-#include "base/platform_thread.h"
 #include "base/time.h"
 #include "base/waitable_event.h"
 #include "media/base/pipeline_impl.h"

net/base/ssl_test_util.cc

@@ -29,7 +29,6 @@
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
-#include "base/platform_thread.h"
 #include "base/string_util.h"
 #include "net/base/tcp_pinger.h"
 #include "net/base/host_resolver.h"

net/url_request/url_request_unittest.h

@@ -16,7 +16,6 @@
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
-#include "base/platform_thread.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "base/thread.h"