Revert windows-specific part of r15937 for debug level 1.

build/toolchain.gypi

Index: build/toolchain.gypi
diff --git a/build/toolchain.gypi b/build/toolchain.gypi
index 36d60c28ab98d03e79d9ba9688b8afd344cacd3f..05933ff9ea4c5578fdbc50718c51dd5e54acb79c 100644
--- a/build/toolchain.gypi
+++ b/build/toolchain.gypi
@@ -61,11 +61,10 @@
     'v8_enable_backtrace%': 0,
 
     # Speeds up Debug builds:
-    # 0 - compiler optimizations off (debuggable) (default). This may
+    # 0 - Compiler optimizations off (debuggable) (default). This may
     #     be 5x slower than Release (or worse).
-    # 1 - turn on compiler optimizations. and #undef DEBUG/#define NDEBUG.
-    #     This may be hard or impossible to debug. This may still be

[Dirk Pranke, 2013/08/01 17:14:25]

Good fix. This comment was just wrong.

-    #     2x slower than Release (or worse).
+    # 1 - Turn on compiler optimizations. This may be hard or impossible to
+    #     debug. This may still be 2x slower than Release (or worse).
     # 2 - Turn on optimizations, and also #undef DEBUG / #define NDEBUG
     #     (but leave V8_ENABLE_CHECKS and most other assertions enabled.
     #     This may cause some v8 tests to fail in the Debug configuration.
@@ -455,14 +454,32 @@
         'msvs_settings': {
           'VCCLCompilerTool': {
             'conditions': [
-              ['component=="shared_library"', {
-                'RuntimeLibrary': '3',  # /MDd
-              }, {
-                'RuntimeLibrary': '1',  # /MTd
-              }],
               ['v8_optimized_debug==0', {
                 'Optimization': '0',
-              }, {
+                'conditions': [
+                  ['component=="shared_library"', {
+                    'RuntimeLibrary': '3',  # /MDd
+                  }, {
+                    'RuntimeLibrary': '1',  # /MTd
+                  }],
+                ],
+              }],
+              ['v8_optimized_debug==1', {
+                'Optimization': '1',
+                'InlineFunctionExpansion': '2',
+                'EnableIntrinsicFunctions': 'true',
+                'FavorSizeOrSpeed': '0',
+                'StringPooling': 'true',
+                'BasicRuntimeChecks': '0',
+                'conditions': [
+                  ['component=="shared_library"', {
+                    'RuntimeLibrary': '3',  # /MDd
+                  }, {
+                    'RuntimeLibrary': '1',  # /MTd
+                  }],
+                ],
+              }],
+              ['v8_optimized_debug==2', {
                 'Optimization': '2',
                 'InlineFunctionExpansion': '2',
                 'EnableIntrinsicFunctions': 'true',
@@ -487,7 +504,11 @@
             'conditions': [
               ['v8_optimized_debug==0', {
                 'LinkIncremental': '2',
-              }, {
+              }],
+              ['v8_optimized_debug==1', {
+                'LinkIncremental': '2',
+              }],
+              ['v8_optimized_debug==2', {
                 'LinkIncremental': '1',
                 'OptimizeReferences': '2',
                 'EnableCOMDATFolding': '2',