fileapi: Rename FileSystemMountProvider to FileSystemBackend

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 7135 matching lines @@
    ...
    fun:_ZN7content14RenderViewImpl10InitializeEPNS_20RenderViewImplParamsE
    fun:_ZN7content14RenderViewImpl6CreateEiRKNS_19RendererPreferencesERK14WebPreferencesPN4base14RefCountedDataIiEEiiilRKSbItNS7_20string16_char_traitsESaItEEbbiRKN6WebKit13WebScreenInfoE17AccessibilityModeb
    fun:_ZN7content16RenderThreadImpl15OnCreateNewViewERK18ViewMsg_New_Params
 }
 {
    bug_247525a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7fileapi25SandboxMountPointProviderC1EPN5quota17QuotaManagerProxyEPN4base19SequencedTaskRunnerERKNS4_8FilePathERKNS_17FileSystemOptionsEPNS1_20SpecialStoragePolicyE
-   fun:_ZN7fileapi17FileSystemContextC1E10scoped_ptrINS_21FileSystemTaskRunnersEN4base14DefaultDeleterIS2_EEEPNS_19ExternalMountPointsEPN5quota20SpecialStoragePolicyEPNS9_17QuotaManagerProxyE12ScopedVectorINS_28FileSystemMountPointProviderEERKNS3_8FilePathERKNS_17FileSystemOptionsE
+   fun:_ZN7fileapi17FileSystemContextC1E10scoped_ptrINS_21FileSystemTaskRunnersEN4base14DefaultDeleterIS2_EEEPNS_19ExternalMountPointsEPN5quota20SpecialStoragePolicyEPNS9_17QuotaManagerProxyE12ScopedVectorINS_17FileSystemBackendEERKNS3_8FilePathERKNS_17FileSystemOptionsE
    fun:_ZN7content23CreateFileSystemContextERKN4base8FilePathEbPN7fileapi19ExternalMountPointsEPN5quota20SpecialStoragePolicyEPNS7_17QuotaManagerProxyE
    fun:_ZN7content20StoragePartitionImpl6CreateEPNS_14BrowserContextEbRKN4base8FilePathE
    fun:_ZN7content23StoragePartitionImplMap3GetERKSsS2_b
    fun:_ZN7content12_GLOBAL__N_129GetStoragePartitionFromConfigEPNS_14BrowserContextERKSsS4_b
    fun:_ZN7content14BrowserContext19GetStoragePartitionEPS0_PNS_12SiteInstanceE
    fun:_ZN7content24NavigationControllerImpl26GetSessionStorageNamespaceEPNS_12SiteInstanceE
    fun:_ZN7content21RenderViewHostManager4InitEPNS_14BrowserContextEPNS_12SiteInstanceEii
    fun:_ZN7content15WebContentsImpl4InitERKNS_11WebContents12CreateParamsE
    fun:_ZN7content15TestWebContents6CreateEPNS_14BrowserContextEPNS_12SiteInstanceE
    fun:_ZN7content25RenderViewHostTestHarness21CreateTestWebContentsEv
@@ skipping 240 matching lines @@
    fun:_ZN7content12_GLOBAL__N_134ClearQuotaManagedOriginsOnIOThreadERK13scoped_refptrIN5quota12QuotaManagerEERKSt3setI4GURLSt4lessIS8_ESaIS8_EENS2_11StorageTypeE
    fun:_ZN7content12_GLOBAL__N_121ClearOriginOnIOThreadEjRK4GURLRK13scoped_refptrIN3net23URLRequestContextGetterEERKS4_IN5quota12QuotaManagerEE
 }
 {
    bug_257069
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base5Value18CreateIntegerValueEi
    fun:_ZN12_GLOBAL__N_145ProfileResetterTest_ResetContentSettings_Test8TestBodyEv
 }