Add PGO targets to Chrome.

chrome/chrome_dll.gypi

Index: chrome/chrome_dll.gypi
diff --git a/chrome/chrome_dll.gypi b/chrome/chrome_dll.gypi
index 13756e105d071a7e2c7d19b3a42a87dea3e1f791..98417b73bb4dd6d1ee8a349bedc8a02423cef0b7 100644
--- a/chrome/chrome_dll.gypi
+++ b/chrome/chrome_dll.gypi
@@ -6,10 +6,10 @@
     ['OS=="mac" or OS=="win"', {
       'targets': [
         {
-          'target_name': 'chrome_dll',
+          'target_name': '<(chrome_dll_target_name)',
           'type': 'none',
           'dependencies': [
-            'chrome_main_dll',
+            '<(chrome_main_dll_target_name)',
           ],
           'conditions': [
             ['OS=="mac" and component=="shared_library"', {
@@ -23,7 +23,7 @@
             }],  # OS=="mac"
             ['chrome_multiple_dll==1', {
               'dependencies': [
-                'chrome_child_dll',
+                '<(chrome_child_dll_target_name)',
               ],
             }],
             ['incremental_chrome_dll==1', {
@@ -37,14 +37,14 @@
                 {
                   'action_name': 'hardlink_to_output',
                   'inputs': [
-                    '$(OutDir)\\initial\\chrome.dll',
+                    '$(OutDir)\\initial\\<(chrome_main_dll_product_name).dll',
                   ],
                   'outputs': [
-                    '$(OutDir)\\chrome.dll',
+                    '$(OutDir)\\<(chrome_main_dll_product_name).dll',
                   ],
                   'action': ['tools\\build\\win\\hardlink_failsafe.bat',
-                             '$(OutDir)\\initial\\chrome.dll',
-                             '$(OutDir)\\chrome.dll'],
+                             '$(OutDir)\\initial\\<(chrome_main_dll_product_name).dll',
+                             '$(OutDir)\\<(chrome_main_dll_product_name).dll'],
                 },
               ],
               'conditions': [
@@ -55,14 +55,14 @@
                       'action_name': 'hardlink_pdb_to_output',
                       'inputs': [
                         # Not the pdb, since gyp doesn't know about it
-                        '$(OutDir)\\initial\\chrome.dll',
+                        '$(OutDir)\\initial\\<(chrome_main_dll_product_name).dll',
                       ],
                       'outputs': [
-                        '$(OutDir)\\chrome.dll.pdb',
+                        '$(OutDir)\\<(chrome_main_dll_product_name).dll.pdb',
                       ],
                       'action': ['tools\\build\\win\\hardlink_failsafe.bat',
-                                 '$(OutDir)\\initial\\chrome.dll.pdb',
-                                 '$(OutDir)\\chrome.dll.pdb'],
+                                 '$(OutDir)\\initial\\<(chrome_main_dll_product_name).pdb',
+                                 '$(OutDir)\\<(chrome_main_dll_product_name).pdb'],
                     }
                   ]
                 }]
@@ -71,7 +71,7 @@
           ]
         },
         {
-          'target_name': 'chrome_main_dll',
+          'target_name': '<(chrome_main_dll_target_name)',
           'type': 'shared_library',
           'variables': {
             'enable_wexit_time_destructors': 1,
@@ -87,6 +87,15 @@
                 '<(DEPTH)/chrome_elf/chrome_elf.gyp:chrome_elf',
               ],
             }],
+            # This ugly hack is required to make sure that the instrumented DLL
+            # gets linked before trying to link the optimized one.
+            # ltcg_value==3 corresponds to the /LTCG:PGOPTIMIZE option.
+            # TODO(sebmarchand): Find a cleaner way to express this dependency.
+            ['OS=="win" and chrome_pgo==1 and ltcg_value==3', {
+              'dependencies': [
+                'chrome_pgo_profile',
+              ],
+            }],
             ['use_aura==1', {
               'dependencies': [
                 '../ui/compositor/compositor.gyp:compositor',
@@ -100,7 +109,7 @@
               ],
             },],
             ['OS=="win"', {
-              'product_name': 'chrome',
+              'product_name': '<(chrome_main_dll_product_name)',
               'dependencies': [
                 # On Windows, link the dependencies (libraries) that make
                 # up actual Chromium functionality into this .dll.
@@ -147,7 +156,7 @@
                   'SubSystem': '2',
                   'conditions': [
                     ['incremental_chrome_dll==1', {
-                      'OutputFile': '$(OutDir)\\initial\\chrome.dll',
+                      'OutputFile': '$(OutDir)\\initial\\<(chrome_main_dll_product_name)',
                       'UseLibraryDependencyInputs': "true",
                     }],
                     ['target_arch=="ia32"', {
@@ -220,6 +229,14 @@
                     'chrome_dll_pdb_workaround',
                    ],
                 }],
+                ['chrome_pgo==1', {
+                  'msvs_settings': {
+                    'VCLinkerTool': {
+                      'LinkTimeCodeGeneration': '<(ltcg_value)',
+                      'ProfileGuidedDatabase': '$(OutDir)\\chrome.pgd',
+                    },
+                  },
+                }],
               ]
             }],
             ['chrome_multiple_dll==1', {
@@ -312,14 +329,14 @@
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions
-        },  # target chrome_main_dll
+        },  # target <(chrome_main_dll_target_name)
       ],  # targets
     }],  # OS=="mac" or OS=="win"
     ['OS=="win"', {
       'targets': [
         {
           # This target is only depended upon on Windows.
-          'target_name': 'chrome_dll_pdb_workaround',
+          'target_name': '<(chrome_dll_target_name)_pdb_workaround',
           'type': 'static_library',
           'sources': [ 'empty_pdb_workaround.cc' ],
           'conditions': [
@@ -330,7 +347,8 @@
                 # output by the final link. See empty_pdb_workaround.cc for
                 # more details.
                 'DebugInformationFormat': '3',
-                'ProgramDataBaseFileName': '<(PRODUCT_DIR)/chrome.dll.pdb',
+                'ProgramDataBaseFileName':
+                    '<(PRODUCT_DIR)/<(chrome_main_dll_product_name).dll.pdb',
               },
              },
             }],
@@ -341,9 +359,9 @@
     ['chrome_multiple_dll', {
       'targets': [
         {
-          'target_name': 'chrome_child_dll',
+          'target_name': '<(chrome_child_dll_target_name)',
           'type': 'shared_library',
-          'product_name': 'chrome_child',
+          'product_name': '<(chrome_child_dll_product_name)',
           'variables': {
             'enable_wexit_time_destructors': 1,
           },
@@ -368,9 +386,28 @@
               'dependencies': [
                 '<(DEPTH)/chrome_elf/chrome_elf.gyp:chrome_elf',
               ],
+              'conditions': [
+                ['chrome_pgo==1', {
+                  'msvs_settings': {
+                    'VCLinkerTool': {
+                      'LinkTimeCodeGeneration': '<(ltcg_value)',
+                      'ProfileGuidedDatabase': '$(OutDir)\\chrome_child.pgd',
+                    },
+                  },
+                }],
+              ],
+            }],
+            # This ugly hack is required to make sure that the instrumented DLL
+            # gets linked before trying to link the optimized one.
+            # ltcg_value==3 corresponds to the /LTCG:PGOPTIMIZE option.
+            # TODO(sebmarchand): Find a cleaner way to express this dependency.
+            ['OS=="win" and chrome_pgo==1 and ltcg_value==3', {
+              'dependencies': [
+                'chrome_pgo_profile',
+              ],
             }],
           ],
-        },  # target chrome_child_dll
+        },  # target <(chrome_child_dll_target_name)
       ],
     }],
   ],