Remove debugger_auto_break flag

The flag was introduced to support console debugger in Chrome. That debugger was replaced by DevTools long time ago and the flag is always true now.

BUG=None
LOG=Y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/220743003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20393 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8-debug.h

@@ -290,7 +290,7 @@ class V8_EXPORT Debug {
    *
    * Generally when message arrives V8 may be in one of 3 states:
    * 1. V8 is running script; V8 will automatically interrupt and process all
-   * pending messages (however auto_break flag should be enabled);
+   * pending messages;
    * 2. V8 is suspended on debug breakpoint; in this state V8 is dedicated
    * to reading and processing debug messages;
    * 3. V8 is not running at all or has called some long-working C++ function;

src/execution.cc

@@ -519,11 +519,9 @@ bool StackGuard::IsDebugCommand() {
 
 
 void StackGuard::DebugCommand() {
-  if (FLAG_debugger_auto_break) {
-    ExecutionAccess access(isolate_);
-    thread_local_.interrupt_flags_ |= DEBUGCOMMAND;
-    set_interrupt_limits(access);
-  }
+  ExecutionAccess access(isolate_);
+  thread_local_.interrupt_flags_ |= DEBUGCOMMAND;
+  set_interrupt_limits(access);
 }
 #endif
 

src/flag-definitions.h

@@ -471,9 +471,6 @@ DEFINE_bool(trace_array_abuse, false,
             "trace out-of-bounds accesses to all arrays")
 DEFINE_implication(trace_array_abuse, trace_js_array_abuse)
 DEFINE_implication(trace_array_abuse, trace_external_array_abuse)
-DEFINE_bool(debugger_auto_break, true,
-            "automatically set the debug break flag when debugger commands are "
-            "in the queue")
 DEFINE_bool(enable_liveedit, true, "enable liveedit experimental feature")
 DEFINE_bool(hard_abort, true, "abort by crashing")
 

test/cctest/test-debug.cc

@@ -5409,8 +5409,6 @@ void BreakpointsDebuggerThread::Run() {
 
 
 void TestRecursiveBreakpointsGeneric(bool global_evaluate) {
-  i::FLAG_debugger_auto_break = true;
-
   BreakpointsDebuggerThread breakpoints_debugger_thread(global_evaluate);
   BreakpointsV8Thread breakpoints_v8_thread;
 
@@ -5881,7 +5879,6 @@ void HostDispatchDebuggerThread::Run() {
 TEST(DebuggerHostDispatch) {
   HostDispatchDebuggerThread host_dispatch_debugger_thread;
   HostDispatchV8Thread host_dispatch_v8_thread;
-  i::FLAG_debugger_auto_break = true;
 
   // Create a V8 environment
   Barriers stack_allocated_host_dispatch_barriers;
@@ -5948,8 +5945,6 @@ TEST(DebuggerDebugMessageDispatch) {
   DebugMessageDispatchDebuggerThread debug_message_dispatch_debugger_thread;
   DebugMessageDispatchV8Thread debug_message_dispatch_v8_thread;
 
-  i::FLAG_debugger_auto_break = true;
-
   // Create a V8 environment
   Barriers stack_allocated_debug_message_dispatch_barriers;
   debug_message_dispatch_barriers =