Adds MessageLoopUIApplication for use on iOS.

base/message_pump_mac.h

Index: base/message_pump_mac.h
diff --git a/base/message_pump_mac.h b/base/message_pump_mac.h
index 3d1ac35914b35eca512b680e5cbb372a2a689bf5..839c1878b217f084cb767f15d5d27436f7a029e1 100644
--- a/base/message_pump_mac.h
+++ b/base/message_pump_mac.h
@@ -38,6 +38,9 @@
 #if !defined(__OBJC__)
 class NSAutoreleasePool;
 #else  // !defined(__OBJC__)
+#if defined(OS_IOS)
+#import <Foundation/Foundation.h>
+#else
 #import <AppKit/AppKit.h>
 
 // Clients must subclass NSApplication and implement this protocol if they use
@@ -48,10 +51,12 @@ class NSAutoreleasePool;
 // necessary.
 - (BOOL)isHandlingSendEvent;
 @end
+#endif  // !defined(OS_IOS)
 #endif  // !defined(__OBJC__)
 
 namespace base {
 
+class RunLoop;
 class TimeTicks;
 
 class MessagePumpCFRunLoopBase : public MessagePump {
@@ -78,6 +83,10 @@ class MessagePumpCFRunLoopBase : public MessagePump {
   int nesting_level() const { return nesting_level_; }
   int run_nesting_level() const { return run_nesting_level_; }
 
+  // Sets this pump's delegate.  Signals the appropriate sources if
+  // |delegateless_work_| is true.  |delegate| can be NULL.
+  void SetDelegate(Delegate* delegate);
+
   // Return an autorelease pool to wrap around any work being performed.
   // In some cases, CreateAutoreleasePool may return nil intentionally to
   // preventing an autorelease pool from being created, allowing any
@@ -231,6 +240,31 @@ class MessagePumpNSRunLoop : public MessagePumpCFRunLoopBase {
   DISALLOW_COPY_AND_ASSIGN(MessagePumpNSRunLoop);
 };
 
+#if defined(OS_IOS)
+// This is a fake message pump.  It attaches sources to the main thread's
+// CFRunLoop, so PostTask() will work, but it is unable to drive the loop
+// directly, so calling Run() or Quit() are errors.
+class MessagePumpUIApplication : public MessagePumpCFRunLoopBase {
+ public:
+  MessagePumpUIApplication() { }
+  virtual void DoRun(Delegate* delegate) OVERRIDE;
+  virtual void Quit() OVERRIDE;
+
+  // This message pump can not spin the main message loop directly.  Instead,
+  // call |Attach()| to set up a delegate.  It is an error to call |Run()|.
+  virtual void Attach(Delegate* delegate);
+
+ protected:
+  virtual ~MessagePumpUIApplication();
+
+ private:
+  base::RunLoop* run_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpUIApplication);
+};
+
+#else
+
 class MessagePumpNSApplication : public MessagePumpCFRunLoopBase {
  public:
   MessagePumpNSApplication();
@@ -268,6 +302,7 @@ class MessagePumpCrApplication : public MessagePumpNSApplication {
  private:
   DISALLOW_COPY_AND_ASSIGN(MessagePumpCrApplication);
 };
+#endif  // !defined(OS_IOS)
 
 class MessagePumpMac {
  public:
@@ -281,6 +316,7 @@ class MessagePumpMac {
   // default NSApplication.
   static MessagePump* Create();
 
+#if !defined(OS_IOS)
   // If a pump is created before the required CrAppProtocol is
   // created, the wrong MessagePump subclass could be used.
   // UsingCrApp() returns false if the message pump was created before
@@ -291,6 +327,7 @@ class MessagePumpMac {
   // Wrapper to query -[NSApp isHandlingSendEvent] from C++ code.
   // Requires NSApp to implement CrAppProtocol.
   BASE_EXPORT static bool IsHandlingSendEvent();
+#endif  // !defined(OS_IOS)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(MessagePumpMac);